Author Topic: Slowly modifying my '82 CB650Z  (Read 9543 times)

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Offline RAFster122s

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Re: Slowly modifying my 650
« Reply #50 on: May 07, 2021, 01:35:41 AM »
Jim,nice work...
Having done the upholstery once you now have the skills you didn't have when you made it the first time. You could do it again and you are likely to find you get better results. Depends upon what you want and what your materials and time costs are...  It isn't a project you spend two hours on and you are done.  Also, wanted to ask? Did you use the layer of contouring foam beneath your new cover. It helps smooth and fill the cover making it look better.  Upholstery shops carry it, it can be as thick as 1/2 inch but generally it is around 1/4" or 1/8" thick.
Anyone who criticizes your work has no right to do so unless they have done the same thing and can show their work... Even then, they are a jerk to criticize your work. Better to offer helpful suggestions and help someone else rather than just tear them down.
You have done good work. No one's work is perfect, as a builder you are going to know and see every tiny issue. Doesn't mean you need to point them out to others.

Enjoy it as you finish sorting it out...
David
David- back in the desert SW!

Offline Jimcg

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Re: Slowly modifying my 650
« Reply #51 on: May 07, 2021, 10:38:26 PM »
Very nice work Jim.
Thanks! I'm looking forward to getting it ouside soon!


Turning out very nice. I liked the original colour combo you posted, but the blue and white will do in the mean time.

Thanks! It's good to know that you can accept the blue at least for now. :D  If you mean the yellow computer test paints I did, I'm sorry to inform you they won't happen (feel free to change, modify and use it). I won't be going back to stock red either.

I chose the paint scheme from another bike I saw online but went with blue instead of green as they had. Many of us have wives to thank for lots of things in our lives and so have I. That's why I chose blue color on the bike, as sort of a tribute to her (she has blue eyes) for having patience with me during all my bike-related frustrations and worries during this winter. I also have a decal on the tank lid which is a copy of a flower tattoo she has (and drawn by our daughter). That's my version of the drive carefully-decal, reminding me that I want to come home in one piece when I go for a ride.


Jim,nice work...
Having done the upholstery once you now have the skills you didn't have when you made it the first time. You could do it again and you are likely to find you get better results. Depends upon what you want and what your materials and time costs are...  It isn't a project you spend two hours on and you are done.  Also, wanted to ask? Did you use the layer of contouring foam beneath your new cover. It helps smooth and fill the cover making it look better.  Upholstery shops carry it, it can be as thick as 1/2 inch but generally it is around 1/4" or 1/8" thick.
Anyone who criticizes your work has no right to do so unless they have done the same thing and can show their work... Even then, they are a jerk to criticize your work. Better to offer helpful suggestions and help someone else rather than just tear them down.
You have done good work. No one's work is perfect, as a builder you are going to know and see every tiny issue. Doesn't mean you need to point them out to others.

Enjoy it as you finish sorting it out...
David

Many thanks for wise and kind words! You are right about learning from the mistakes I did. If I repaint I will surely do better - at least I would secure thing to avoid them from dropping onto the floor. :o  The 2K paint was really fun to work with, although a bit stressful.

I dont think I would try and remake the seat myself. I did use the kind of thinner foam you mentioned. The bubbly shapes that can be seen underneath are all the layers of vinyl that was folded inwards and take up space and create irregular lines and surfaces. But that project was really above my skills and the sewing should have been a more pwerful one as well. I'll leave that to a professional next time or choose a less complicated design.

I was disappointed at first (about the seat and paint) because I had to high expectations of what I was capable of, but have during the project reached a state along with your thoughts, where I actually feel very pleased with the result - since I am a beginner at this.

/Jim
« Last Edit: May 07, 2021, 10:43:00 PM by Jimcg »
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline RAFster122s

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Re: Slowly modifying my 650
« Reply #52 on: May 08, 2021, 04:21:29 AM »
Jim, have you ever seen aluminum panel beating done before? I have seen it done with lead shot filled bags and ball peen hammers. To a certain extent you can use a hard wood that is layered in the shape you desire and you tack it down around the perimeter beyond the edges you would trim off. Then you slowly work the metal working from the outside in to slowly stretch the metal to rough shape. The lead shot filled bags then used to smooth and finish it off. It won’t give you super smooth surface unless you take hours slowly forming and tapping it into that transition. A bit of time sanding the outer surface with high grit followed by polishing it.

Just thinking about how to add a bit of 3D work to your side covers it you want to take a journey down the rabbit hole of metal shaping using very old school methods.

Or there is the possibility to shape side covers from blocks of extruded foam and make molds from those to create side covers from. Or, vacuum bag fiber glass or carbon fiber over the foam and then use solvents or a rotary wire brush to remove the foam.  I can tell you how to build an inexpensive vacuum pump to vacuum bag things from an aquarium pump,  a board, a metal coffee can, some brass tubes. Epoxying the board to the can and soldering the tubes to the can. It works really well. The vacuum bag can be created from clear plastic sheeting and some vacuum tubing and using caulking to seal the bag.
Composites take a little experimenting for a couple dry runs to practice  but it is doable with the skills you have and aptitude to learn.
Leave the carbon fiber to when you have more experience if you want a gloss twill carbon fiber side cover, do go for that as your first or second time...
David- back in the desert SW!

Offline Jimcg

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Re: Slowly modifying my 650
« Reply #53 on: May 08, 2021, 10:25:47 PM »
Jim, have you ever seen aluminum panel beating done before? I have seen it done with lead shot filled bags and ball peen hammers. To a certain extent you can use a hard wood that is layered in the shape you desire and you tack it down around the perimeter beyond the edges you would trim off. Then you slowly work the metal working from the outside in to slowly stretch the metal to rough shape. The lead shot filled bags then used to smooth and finish it off. It won’t give you super smooth surface unless you take hours slowly forming and tapping it into that transition. A bit of time sanding the outer surface with high grit followed by polishing it.

Just thinking about how to add a bit of 3D work to your side covers it you want to take a journey down the rabbit hole of metal shaping using very old school methods.

Or there is the possibility to shape side covers from blocks of extruded foam and make molds from those to create side covers from. Or, vacuum bag fiber glass or carbon fiber over the foam and then use solvents or a rotary wire brush to remove the foam.  I can tell you how to build an inexpensive vacuum pump to vacuum bag things from an aquarium pump,  a board, a metal coffee can, some brass tubes. Epoxying the board to the can and soldering the tubes to the can. It works really well. The vacuum bag can be created from clear plastic sheeting and some vacuum tubing and using caulking to seal the bag.
Composites take a little experimenting for a couple dry runs to practice  but it is doable with the skills you have and aptitude to learn.
Leave the carbon fiber to when you have more experience if you want a gloss twill carbon fiber side cover, do go for that as your first or second time...

David, thanks for all the ideas about going further with side covers. For now I'm satisfied the way they turned out. They are actually left over small aluminium park signs from work, that I hand shaped and cut to follow the frame. I'll post some more pictures of the bike, the covers and how I attached them once I'm done. At the moment I want to focus on getting finished so I can drive it again.  :)

At one point during the winter I had an idea to leave them in raw aluminium and also remove all paint from the tank, for some kind of industrial look, and then I wouldn't mind shaping the covers some more. Might go there sometime in the future...

/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline Jimcg

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Re: Slowly modifying my 650
« Reply #54 on: June 03, 2021, 02:05:15 AM »
Last friday I had planned to take my finally finished little 650 for it's first ride but the petcock leaked and the ride was cancelled. A new one arrived yesterday from https://www.cb-four.com (in Germany), perfect in time since I have my day off from work today and weather was super nice!

With the new petcock in place I went for a short test ride. All seemed well after that so I had to pay my brother a visit and show the bike. Here are a few pictures from outside his house:














It feels really great to be able to take it for a ride again and it turned out the way I wanted. I'm a happy man right now!  :D This afternoon it's time for to have it inspected and hopefully approved. I'm a bit concerned about the noise level...

Edit: It failed the test due to noise level. I'm still a happy man since that's an easy thing to fix.

/Jim

« Last Edit: June 03, 2021, 05:45:52 AM by Jimcg »
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline flatlander

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Re: Slowly modifying my 650
« Reply #55 on: June 05, 2021, 12:13:31 AM »
hejsan!
your bike has been nominated as a candidate for the bike of the month. you can go to the thread and accept the nomination: http://forums.sohc4.net/index.php/topic,180400.msg2169562.html#msg2169562


Offline Jimcg

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Re: Slowly modifying my 650
« Reply #56 on: June 05, 2021, 04:21:35 AM »
hejsan!
your bike has been nominated as a candidate for the bike of the month. you can go to the thread and accept the nomination: http://forums.sohc4.net/index.php/topic,180400.msg2169562.html#msg2169562

Haha, hejsan! 😃

That was really surprising and fun. Myself I don't really think my bike is in the same league as nominated bikes usually are. But if course, I'll jump into the thread and accept.

/Jim

1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline flatlander

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Re: Slowly modifying my 650
« Reply #57 on: June 05, 2021, 06:01:39 AM »
don't be shy. you had a good vision from the start, executed consistently on it and the outcome looks great.

Offline Jimcg

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Re: Slowly modifying my 650
« Reply #58 on: June 23, 2021, 02:58:06 AM »
I bought new shocks from 4into1 and they arrived a few days ago. They are cheap ones, so I had low expectations regarding quality but fell for them being adjustable between 350-360 mm eye to clevis. The stock ones were 335 mm and my plan was to use the new ones at their lowest setting, to raise the rear end just slightly.

Once they were on the bike they looked okay and the height was perfect but just sitting on the bike in the garage they felt waaay to soft... I know you get what you pay for but description said max weight for them was 200 kg and I checked the weight resting on the back wheel with me sitting on the bike and it was around 175 kg so I thought they would work.

So I took some quick measurements and discovered that the springs from the original shocks would probably fit and both sets were relatively easy to disassemble. So now I have new shocks with my old springs on them (had to mount the springs upside down). I'm very pleased with the stance but I think the combo turned out a bit to stiff, since the original springs had to get some preload to be able to fit them at all (I forgot to compare the new and old springs when they were removed so the comparision failed a bit). I'll keep them like this for a while and evaluate or until I come up with a better solution.






/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline SOHC4 Cafe Racer Fan

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Re: Slowly modifying my 650
« Reply #59 on: June 23, 2021, 10:24:41 AM »
Jim,

If you are just going to scoot around town, you can stop reading this post. But if you are going to ride your bike at a spirited pace, I would suggest having someone who knows a thing or two about suspension look at your set up.  You don't want you rear to be either too soft or too stiff you you will not have good feel in corners and traction. You are in the homeland of Ohlins, after all.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline Jimcg

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Re: Slowly modifying my 650
« Reply #60 on: June 23, 2021, 11:36:35 AM »
Jim,

If you are just going to scoot around town, you can stop reading this post. But if you are going to ride your bike at a spirited pace, I would suggest having someone who knows a thing or two about suspension look at your set up.  You don't want you rear to be either too soft or too stiff you you will not have good feel in corners and traction. You are in the homeland of Ohlins, after all.

I sure don't want to stop reading and continue learning more from fellow members with more knowledge being kind enough to share that.  :)

Although I don't think I will ever push the bike to it's limits, I don't want do things that drastically moves it's limits to the worse. My plan was to raise the rear just a little - I didn't think 15 mm would make such a big difference. I fully understand that a too stiff suspension can be dangerous and that the opposite is a bad option too - I want the rear wheel to stay in contact with the ground. When I wrote that I would use it like this for a while and evaluate I meant on shorter rides to work, in town. It's an easy swap back if I decide to move the spings back to the original shocks.

I will look a bit deeper into setting up the shocks I have on now and if I reach a setting I think is good I will absolutely have someone more experienced have a look after that. I may also have put in to much fork oil (as I wrote earlier in this thread), as they seem to be on the stiff side too. Probably better idea to have someone have a look before I do any changes at all because the only thing I can compare with regarding a CB650 is how my bike felt last year and at that time I'm pretty sure it still had factory fork oil along with the original shocks at the rear. 

If I can't make something useful and safe with the combo I have now I'll go back to stock until I can afford better ones that can be ordered in correct height and suited for the weight of the bike and me. Ohlins sure have a good reputation but a quick look into the wallet tells me I'll have to look for something in between price wise.

Thanks again for writing!

/Jim
« Last Edit: June 23, 2021, 11:38:38 AM by Jimcg »
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline SOHC4 Cafe Racer Fan

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Re: Slowly modifying my 650
« Reply #61 on: June 23, 2021, 07:09:16 PM »
Jim,

Thanks for taking my advice as it was intended.  In general, raising the rear end by 1-1.5 inches will sharpen the handling and not destabilize the bike.  I did the same with my CB550 (very similar geometry) and my CB750.  You just want to make sure that the spring rate and damping is proper so that the rear tire can properly absorb and track the road (and not skip if too stiff).  Any competent suspension tech can help with this.

Great looking ride!  Enjoy it!

Don
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline Jimcg

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Re: Slowly modifying my 650
« Reply #62 on: July 27, 2021, 10:49:45 PM »
Switched back to the stock shocks again yesterday, but with some changes made to them. If I had come up with the idea I used now before I never would have bought the adjustable ones from 4into1 a month ago. Well, well - they were cheap and I learned some from that process. The idea for this came the other day when I happened to spot something in my combined workout shed/nowadays also motorcycle garage.

Since the CB650Z shocks can be disassembled, what I did was to add a nut as a spacer under the upper eye mount, making the entire shock 10 mm longer. I also added a "collar" under the spring to keep the spring in its correct operating length. The collar was actually 20 mm and would have given a larger preload but last time I had them on I used them a maximum preload setting and the span in height where the bottom part of the spring rests is about 15 mm from least to max preload so if I set the preload to second step now with my collar in place it would be the same amount of preload as before but with the shock being 10 mm longer (going from 335 to 345 in eye to clevis length). That way I can keep the stock look (apart from the knurled collar being visible but they don't bother me) and still have several more preload steps left if needed.






This is the collar from the dumbbell weight lock I used and where I put it.







This is the top of the shock (before in first pic) and with the nut "spacer" I used. Of course this solution sacrifices a few threads of the rod going into the upper mount but there's still a good portion of the rod in there. Buy the way, those are mm fine threads in case someone wonders... I used a washer for the rubber bump stop to rest on (things bolted together after photo taken). Should the washer turn out to be to weak I can always replace the nut and washer combo with a solid spacer instead. For now I'm trying things out.





My "spring compressor"! Sort of a mini workout compressing the spring that way. Works fine but takes some patience. If you compress to much on either strap, they all slip to the same side next to each other and the springs looks like a banana. Small and equal steps works.





Back on the bike again. Just slightly raised compared to stock, just as I wanted from the beginning.

I suppose this counts as a "redneck solution" to many ;D but I always try and look around for things I already have to see if I can use that instead of buying new things. That way I can do things I couldn't afford otherwise. The 4into1 shocks I bought recently and now have removed was an impulse purchase and I didn't do enough research before buying them. Will try and sell them to someone with a lighter bike.

/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline Jimcg

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Re: Slowly modifying my 650
« Reply #63 on: August 06, 2021, 11:03:12 AM »
Just a minor change made, but it was such beautiful summer light outside when I got home so I couldn't resist taking a few pictures.

The first thing I did when I bought the bike last year was to remove the huge rear view mirrors. I bought smaller ones but they been annoying me too - don't like the "insect antenna" visual effect they make (there might be a name for the disfunction in my brain, I don't know). I can't have bar end ones since I drive the bike up on a ramp through a narrow door opening only two inches wider than the handle bars (ramp and doorway can be seen behind the bike on second and third picture below) every time I come back after a ride. And being without mirrors is not an option safety wise. So I mounted one of them under the handle bar's left side to see how I like the looks and how well it works.










Our dog seemed to wonder if we couldn't play instead of whatever I was up to...



Best shot for today and the low mounted mirror works fine. I'm still pleased with the way the bike looks but feel something will have to be done about the naked or empty look of the rear wheel, when looking at it from right rear (also visible in the second picture above). Only difference from the opposite side is sprocket and chain but to me it looks as something is missing. But...  ;D I have spotted a very nice looking 4-1 exhaust that would solve that "issue" for me, as well as hopefully find the perfect sound too. The cheap mufflers I have now are a little to loud even with db killers and stuff inside.

/Jim
« Last Edit: August 11, 2021, 10:47:04 PM by Jimcg »
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline SOHC4 Cafe Racer Fan

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Re: Slowly modifying my '82 CB650Z
« Reply #64 on: August 12, 2021, 09:02:21 AM »
Stop teasing by editing the same darn post over and over.   ;D
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline Jimcg

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Re: Slowly modifying my '82 CB650Z
« Reply #65 on: August 12, 2021, 11:22:08 AM »
Stop teasing by editing the same darn post over and over.   ;D

Oops, sorry! I have gone back a couple of times lately, changed the title of the thread and also made some corrections, language wise. Do those kind of changes trigger a mail if someone subscribes?

Sorry about that! 😄

/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline Jimcg

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Re: Slowly modifying my '82 CB650Z
« Reply #66 on: August 12, 2021, 12:22:41 PM »
To compensate for probably creating "dummy posts" l can at least show the exhaust system I'm drooling over:
https://www.marving.com/en/honda-cb-650/4737-marving-h-3304-bc-honda-cb-650.html

I hope to buy a set until next season.

/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline grcamna2

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Re: Slowly modifying my '82 CB650Z
« Reply #67 on: August 12, 2021, 01:42:50 PM »
The bike looks good  8) !
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Jimcg

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Re: Slowly modifying my '82 CB650Z
« Reply #68 on: August 26, 2021, 11:35:23 AM »
The bike looks good  8) !

Thanks!


Nothing new to look at really, just thought I'd share if someone searches the forum and possibly can have some use for the sound sample. I went for a ride a few days ago and remembered talking exhaust sounds with guy in Sweden so I put the phone in my chest pocket and recorded one take off through the gears.

The exhaust set up is original headers, cheap Megaton mufflers (was way to loud for me and our laws) now equipped with universal db killers wrapped with one layer of exhaust dampening. I really like the type of sound they make but it's still a bit to hard in reality (for my taste). As I wrote earlier, I'm aiming for a Marving 4-1 some day.

Here's what it sounds like:

20210822_184759_001 by Jim Gahnfelt, on Flickr


Two pictures from that same ride:

20210822_204120 by Jim Gahnfelt, on Flickr

20210822_184046 by Jim Gahnfelt, on Flickr


After this post I might have to stop spamming my own thread with just more pictures, until I have actually done something to the bike. But then again, it's riding season here now...


/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline seanbarney41

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Re: Slowly modifying my '82 CB650Z
« Reply #69 on: August 26, 2021, 02:04:36 PM »
Sounds pretty cool...especially compared to my stock exhausted '82 standard, which has virtually no exhaust sound at all!  I have been playing with sohc4's for years now and just this summer got my first 650...and besides the ugly looks, I am pleasantly surprised what a strong performer it is!
If it works good, it looks good...

Offline Jimcg

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Re: Slowly modifying my '82 CB650Z
« Reply #70 on: August 26, 2021, 11:40:14 PM »
Sounds pretty cool...especially compared to my stock exhausted '82 standard, which has virtually no exhaust sound at all!

That's how I felt too when I bought the bike last year, boring silent. Eventually I'll find the right sound level for my taste.

/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline Jimcg

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Re: Slowly modifying my '82 CB650Z
« Reply #71 on: September 26, 2021, 11:44:11 AM »
The more I thought about it the more I started to hesitate about my 4-1 exhaust dreams and plans. With such an exhaust the (in my opinion) a bit ugly and fat looking fotpeg brackets on the '82 CB650 will stand out even more on the bike's left side, if there would be no muffler present and I wouldn't like that... Removing or cutting the brackets didn't feel like an interesting option to me. I already tried to mask the brackets a little by putting Honda CB900 stickers to them. Besides, I also realized I like the dual pipe openings matching the dual tail lights from behind.

So... I reset my thinking and tried to look for a way to combine the above with what I wanted from the beginning - more and better sound than stock (but not to loud), size wise something in between the short ones I had until now compared to stock but still covering more on the right side (wrote a few posts ago about that side of the rear wheel looked to empty or naked for my taste). To get there I realized I needed larger mufflers along with a flatter angle on the middle upswept pipe.

After lots of googling, stainless pipes with a 15 degree angle were found in UK Ebay. They had to be polished to look okay, but that was surprisingly easy, less than an hour for each side and they looked almost like chrome. After that new 23" mufflers were fitted. The result matches the things I wanted as well as eliminates the things I didn't like, so I'm very pleased with the looks. Might even say I'm fully satisified.  ;D  As for the sound, these might be the perfect mufflers for my taste too. Good thing about them is that three bolts hold the rear mounted baffles, so they will be easily modified if I'd like to make changes to the sound level further on.

Pictures from this evenings ride, just for showing the exhaust:


20210926_183359 by Jim Gahnfelt, on Flickr

20210926_183343 by Jim Gahnfelt, on Flickr

20210926_183429 by Jim Gahnfelt, on Flickr

20210926_183446 by Jim Gahnfelt, on Flickr

20210926_183457 by Jim Gahnfelt, on Flickr

20210926_183507 by Jim Gahnfelt, on Flickr


/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline rb550four

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Re: Slowly modifying my '82 CB650Z
« Reply #72 on: September 26, 2021, 02:18:32 PM »
I really like those mufflers....They just look right. What are they?
A few Honda 500's, a few Honda 550's, a few Honda 650's, '72 cb 450, a couple 500/550/650 hybrids, and 2001 750. 
  550 Snowbike -Somebody had to do it.
  http://forums.sohc4.net/index.php/topic,101678.0.html             
http://forums.sohc4.net/index.php/topic,137317.msg1550907.html#msg1550907

Offline Jimcg

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Re: Slowly modifying my '82 CB650Z
« Reply #73 on: September 26, 2021, 09:52:59 PM »
I really like those mufflers....They just look right. What are they?

Me too. I bought them from a Swedish company, but I wouldn't be surprised if they are made in China. I looked at the boxes but there were no labels. Here's where I ordered them:

https://www.hojstyling.se/produkt/viper-universal-ljuddampare-23-dunstall-look/

/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?

Offline Jimcg

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Re: Slowly modifying my '82 CB650Z
« Reply #74 on: April 26, 2022, 11:15:13 AM »
Spring has finally returned to Sweden!

The only thing I did to the bike during the winter was to replace the brake lines to braided ones. I would have preferred new rubber ones for the looks, but didn't find a model specific complete kit, but that was available if I went for braided ones and I am a lazy person. Didn't make much of a difference to the looks so I'm pleased as they seem to work fine too.

For some reason that I don't know, I felt a need to install a couple of fog lights, just to see if I'd like them on the bike. Used a clamp type bracket to the frame so they are easy to remove if I change my mind. I like what they add to the overall appearance so they will stay on for now.

I had filled the tank up with fresh fuel and stabilizer in november, charged the battery a few times during the winter and kept the bike raised on stands front and rear to protect the tires. First startup a couple of weeks ago went fine and first ride felt really great, both the bike and me inside. Never been waiting for spring so much as I did now, owning this little Honda.

Looking forward to a long riding season!

Here are a few pics from before I drove home from work today:

20220426_190343 by Jim Gahnfelt, on Flickr

20220426_190359 by Jim Gahnfelt, on Flickr

20220426_190424 by Jim Gahnfelt, on Flickr

20220426_190443 by Jim Gahnfelt, on Flickr

20220426_190519 by Jim Gahnfelt, on Flickr


/Jim
1982 CB650Z RC03 owner in Eskilstuna, Sweden

About my bike:
http://forums.sohc4.net/index.php/topic,183848.0.html

Just the pictures and no text:
https://www.flickr.com/photos/189154615@N04/?