Author Topic: From Sh*tty to Shiny: Sbeckman7's CB350F Cafe Resto  (Read 66986 times)

0 Members and 1 Guest are viewing this topic.

Offline sbeckman7

  • Glutton For Punishment And/Or
  • Hot Shot
  • ***
  • Posts: 304
  • Slow and steady
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #125 on: February 11, 2016, 03:07:51 PM »
I was looking at the pics you posted w/ the fresh carbs.,is that from his Ebay posting? because it shows the kits are K&L which may be decent considering if they were made in Japan.Do you have those carbs open on your bench ?

These pictures are from the eBay listing.  I should have them sometime next week :) 

Regarding carb tuning... I will report back on my plugs once I get it running  ;D  My manual shows #75 main jet as stock for the 350F and 400F so that is definitely what is in the rebuilt carbs.  Likely with a #35 idle jet as well.

Offline harisuluv

  • Master
  • *****
  • Posts: 2,009
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #126 on: February 11, 2016, 06:12:31 PM »
Looks like he forgot to put in one of the bushings.

Offline sbeckman7

  • Glutton For Punishment And/Or
  • Hot Shot
  • ***
  • Posts: 304
  • Slow and steady
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #127 on: February 11, 2016, 09:15:50 PM »
Looks like he forgot to put in one of the bushings.

I'm impressed that you saw that.. Also not too happy about that  ::)  I will send the seller a message.

I made a good amount of progress tonight and I am happy to say I think the frame is going to turn out well :)  I would like to share some pictures to better explain my "vision" for this bike.  The elements I have in mind are contrast and grayscale with some small accents in red.  The majority of the bike will be painted black, however the frame and gas tank will be bare steel.  The sandblasted finish was to ordinary to me and would also look more like normal paint once powder coated.  Brushing the steel does a much better job of highlighting the lack of paint on these surfaces, and it gives me a little more contrast to the black by reflecting more light than the sandblasted metal.  The tank will have a thick red pinstripe down the left side, and several details on the engine and controls will be red as well.  Other than that, it's all black  8)

I began by brushing my frame with a wire wheel attached to a drill.  The key here was going slowly, in terms of drill speed and my movement as well.  This combination yielded a distinct brushed finish while preserving the texture.  Spinning the wire wheel too fast brought the surface closer to a polished finish.



After experimenting with a few different grits of sandpaper, I found 150 grit to blend perfectly with the marks from the wire wheel.  I used the sandpaper to reach smaller spaces the drill couldn't reach as well as to blend everything together.  It also worked very well for removing minor blemishes in the metal.



For those who didn't know, my frame had a decent amount of standing water inside and no matter how much I tried, it was impossible to remove completely.  Every time I flipped the frame upside down, I would get a series of drips of gross black water through several tiny pinholes in the metal.  I realized a way to cure this once and for all would be with application of heat, however once I started I realized it could also play a role in the aesthetics of the frame itself.  Here is the result: notice the opposite side of the frame got sprayed with volcanic-grade steam and gross water!  It's mostly clean now.





I didn't finish the entire frame today but I would say I am ⅔ of the way there :)

But wait, there's more!  Pulled the pistons to clean them and inspect the sidewalls and rings.  Cal, you mentioned measuring the ring gap while installed.  How does this one look?!  ;D ;D


All the others were much better (i.e. not seized) and I will begin cleaning them tonight or tomorrow morning.  My flex hone also came today, but I was wrong about having cutting oil in the garage.  I will look for honing-specific oil tomorrow at the auto parts store :)


In the background of several pictures you can see my first motorcycle: a '97 Triumph Daytona.  It taught me everything I know so far about motorcycle repair and it was a great thing to learn with.  But this little Honda, I want people to look at it and say, "Wow. That is a work of art."

Spence
« Last Edit: February 11, 2016, 09:22:26 PM by sbeckman7 »

Offline MoMo

  • Really Old Timer ...
  • *******
  • Posts: 8,271
  • Ride like you're invisible
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #128 on: February 11, 2016, 09:35:43 PM »
Rings are placed inside the bore to measure the end gap

Online grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,330
  • I love to restore & travel. Keep'em Going Strong !
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #129 on: February 11, 2016, 10:09:36 PM »
That nasty water in the frame was gross ! Was that bike parked in a wet area outside(in Marin Co. near the ocean?)all it's life before you purchased it ?
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 sbeckman7

  • Glutton For Punishment And/Or
  • Hot Shot
  • ***
  • Posts: 304
  • Slow and steady
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #130 on: February 11, 2016, 10:20:29 PM »
Rings are placed inside the bore to measure the end gap

Oh I actually didn't know that.  Guess my joke didn't even work then  ::)

That nasty water in the frame was gross ! Was that bike parked in a wet area outside(in Marin Co. near the ocean?)all it's life before you purchased it ?

I think so..  ;D

Online grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,330
  • I love to restore & travel. Keep'em Going Strong !
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #131 on: February 11, 2016, 10:36:51 PM »
Rings are placed inside the bore to measure the end gap

Oh I actually didn't know that.  Guess my joke didn't even work then  ::)

That nasty water in the frame was gross ! Was that bike parked in a wet area outside(in Marin Co. near the ocean?)all it's life before you purchased it ?

I think so..  ;D

lol  :D
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 MoMo

  • Really Old Timer ...
  • *******
  • Posts: 8,271
  • Ride like you're invisible
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #132 on: February 12, 2016, 02:29:30 AM »
Here is an example of poor drainage(and other factors) taken to the ultimate conclusion :o :o :o



Offline sbeckman7

  • Glutton For Punishment And/Or
  • Hot Shot
  • ***
  • Posts: 304
  • Slow and steady
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #133 on: February 12, 2016, 11:53:41 AM »
Holy moly! Glad my frame isn't that bad  ;D  If I am lucky my head will arrive on schedule today, although I doubt it because as of last night it was in Des Moines, IA.  But at least I can hone my cylinders!

Offline SOHC4 Cafe Racer Fan

  • Speak up, Whipper-Snapper! I'm a
  • Really Old Timer ...
  • *******
  • Posts: 15,556
  • SOHC/4 Member #1235
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #134 on: February 12, 2016, 03:40:21 PM »
Damn, that cross-member "supporting" the centerstand looks ready to come free.  Yikes.
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

Online grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,330
  • I love to restore & travel. Keep'em Going Strong !
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #135 on: February 12, 2016, 04:05:14 PM »
Here is an example of poor drainage(and other factors) taken to the ultimate conclusion :o :o :o




Larry,
Was this from your original frame from your red CB750 ?
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 MoMo

  • Really Old Timer ...
  • *******
  • Posts: 8,271
  • Ride like you're invisible
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #136 on: February 12, 2016, 06:06:48 PM »
Here is an example of poor drainage(and other factors) taken to the ultimate conclusion :o :o :o




Larry,
Was this from your original frame from your red CB750 ?





Good memory ;) :)  Still have the bike,  it's a shame as I never ride it :-[  Trying to sell it though

Offline MoMo

  • Really Old Timer ...
  • *******
  • Posts: 8,271
  • Ride like you're invisible
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #137 on: February 12, 2016, 06:08:16 PM »
Damn, that cross-member "supporting" the centerstand looks ready to come free.  Yikes.



After I bought the bike I rode it  once  just like that to see how bad it would flex..............took it up to 70 without any problem.
« Last Edit: February 13, 2016, 03:43:04 AM by MoMo »

Offline SOHC4 Cafe Racer Fan

  • Speak up, Whipper-Snapper! I'm a
  • Really Old Timer ...
  • *******
  • Posts: 15,556
  • SOHC/4 Member #1235
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #138 on: February 12, 2016, 10:57:51 PM »
Damn, that cross-member "supporting" the centerstand looks ready to come free.  Yikes.



After I bought the bike I rode it like once that just to see how bad it would flex..............took it up to 70 without any problem.

Wow!  :o
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 sbeckman7

  • Glutton For Punishment And/Or
  • Hot Shot
  • ***
  • Posts: 304
  • Slow and steady
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #139 on: February 14, 2016, 10:33:08 PM »
Been a little quiet while I was waiting for my parts to arrive, but the carbs showed up and the head will hopefully be here tomorrow  :)
Happily, the carbs are not missing that washer as harisuluv pointed out earlier, and the seller contacted me as well via message to let me know it was an extra bushing in the picture.  They look great!!  Very happy for the price.



Tomorrow I plan on cleaning the pistons and honing the cylinders, which will just leave me with new studs to source before I can reassemble the engine!  I am hoping the intake box and exhaust will be ready by the end of the month.  The clear powder coat for the frame is on the way and hopefully this coming Saturday the frame itself will get painted!  Things are coming along ;)

Online grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,330
  • I love to restore & travel. Keep'em Going Strong !
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #140 on: February 14, 2016, 10:40:51 PM »
Nice looking rack of carbs.,was it a private seller or a commercial business that sold them to you? he spent lot's of time on them  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 sbeckman7

  • Glutton For Punishment And/Or
  • Hot Shot
  • ***
  • Posts: 304
  • Slow and steady
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #141 on: February 14, 2016, 11:04:05 PM »
Nice looking rack of carbs.,was it a private seller or a commercial business that sold them to you? he spent lot's of time on them  8)

I believe this came form an individual who rebuilt them himself although I can't say for sure.  His eBay store/username is CB400fss and he was very straightforward to deal with.  I would recommend  :)

Online grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,330
  • I love to restore & travel. Keep'em Going Strong !
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #142 on: February 15, 2016, 06:35:14 AM »
I agree w/ cal about checking them,make sure the float heights are correct also and all the same between the 4.
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 MoMo

  • Really Old Timer ...
  • *******
  • Posts: 8,271
  • Ride like you're invisible
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #143 on: February 15, 2016, 05:37:06 PM »
I agree w/ cal about checking them,make sure the float heights are correct also and all the same between the 4.



The seller has another set posted for sale on Ebay.  The set looks like he knows what he is doing but I'd still double check, as stated better to do it now than have to pull the carbs off later

Offline sbeckman7

  • Glutton For Punishment And/Or
  • Hot Shot
  • ***
  • Posts: 304
  • Slow and steady
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #144 on: February 15, 2016, 07:31:14 PM »
Ok guys, I'll check the float height after dinner.  I just confirmed the stock jetting, with the needle on the middle setting.  I will have to figure out how to measure/adjust the float height as I never looked into that before.  I also honed my cylinders today :)


Online grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,330
  • I love to restore & travel. Keep'em Going Strong !
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #145 on: February 15, 2016, 07:50:34 PM »
Ok guys, I'll check the float height after dinner.  I just confirmed the stock jetting, with the needle on the middle setting.  I will have to figure out how to measure/adjust the float height as I never looked into that before.  I also honed my cylinders today :)



Sbeckman7,
I think now is a good time to use an inside telescoping precision width gauge and then a large micrometer to measure the diameter of each of you're cylinder bores all the way up and down to tell if they are actually still round or oval shaped from piston wear.Then you can measure each corresponding piston at their widest point(skirt)to tell what the actual clearance is between the parts(I don't have these instruments but have used them before..)but I could imagine you should be close to the correct tolerance. That hone job looks sweet  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 sbeckman7

  • Glutton For Punishment And/Or
  • Hot Shot
  • ***
  • Posts: 304
  • Slow and steady
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #146 on: February 15, 2016, 08:10:42 PM »
Sbeckman7,
I think now is a good time to use an inside telescoping precision width gauge and then a large micrometer to measure the diameter of each of you're cylinder bores all the way up and down to tell if they are actually still round or oval shaped from piston wear.Then you can measure each corresponding piston at their widest point(skirt)to tell what the actual clearance is between the parts(I don't have these instruments but have used them before..)but I could imagine you should be close to the correct tolerance. That hone job looks sweet  8)

Thanks!  I don't have any tools to measure the cylinder bores as you described, and I will check them with a micrometer but to be honest I just want to button it back together at this point.

Offline MoMo

  • Really Old Timer ...
  • *******
  • Posts: 8,271
  • Ride like you're invisible
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #147 on: February 15, 2016, 09:48:55 PM »
Flex Hone does an awesome job. float height is measured from the base of the carb to the crown of the float with the float tang just barely resting on the float needle

Offline sbeckman7

  • Glutton For Punishment And/Or
  • Hot Shot
  • ***
  • Posts: 304
  • Slow and steady
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #148 on: February 16, 2016, 08:49:33 AM »
You did a perfect job on those cylinders with a hone! Slip your rings inside the piston and measure the end gap before you button it up. Enthusiasm is a great thing; rushing is a PITA later.

Thanks Cal! I am assuming the only way to measure this is to seat each piston until the first ring is compressed inside the cylinder and then measure, seat pistons to 2nd ring and repeat, 3rd ring and repeat?

Offline SOHC4 Cafe Racer Fan

  • Speak up, Whipper-Snapper! I'm a
  • Really Old Timer ...
  • *******
  • Posts: 15,556
  • SOHC/4 Member #1235
Re: Sbeckman7's Scrap-Worthy CB350F Cafe Resto
« Reply #149 on: February 16, 2016, 11:56:21 AM »
Nope, ditch the pistons altogether. Slightly compress the rings so they slide into the bore (they will fit). Then while they're being held in with friction, use a feeler gauge to measure the opening gap. Specs are in the book for Service Limits.

Handle the rings carefully, they are prone to breaking if you meathead them.

Meathead! Hamfist! Now, I'm hungry.

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