Author Topic: Marissa's 1972 CB500  (Read 95127 times)

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Offline HondaMan

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Re: Marissa's 1972 CB500
« Reply #350 on: May 09, 2019, 07:02:33 PM »
It's snowing here again...

Where? It's may!!!

Colorado, west of Denver. It snowed all last night and all day today, but the melting has kept up pretty well this time.
I've shovelled 2" of snow off my sidewalks on June 2, though (2012, I think it was?).
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Offline MauiK3

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Re: Marissa's 1972 CB500
« Reply #351 on: May 09, 2019, 08:43:35 PM »
Condolences abound.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline Godffery

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Re: Marissa's 1972 CB500
« Reply #352 on: May 10, 2019, 12:38:25 AM »
 More of the same, here in Wisconsin. I'm feel'n yer pain my friends.

   ( The Midwest... Where America shakes it's fist at the ski. )

Offline PeWe

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Re: Marissa's 1972 CB500
« Reply #353 on: May 10, 2019, 08:43:28 AM »
It's snowing here again...

Where? It's may!!!

Colorado, west of Denver. It snowed all last night and all day today, but the melting has kept up pretty well this time.
I've shovelled 2" of snow off my sidewalks on June 2, though (2012, I think it was?).
Now legal mushrooms might be a comfort forgetting the bad weather in Denver....
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline DaveBarbier

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Re: Marissa's 1972 CB500
« Reply #354 on: May 10, 2019, 09:37:32 AM »
It's snowing here again...

Where? It's may!!!

Colorado, west of Denver. It snowed all last night and all day today, but the melting has kept up pretty well this time.
I've shovelled 2" of snow off my sidewalks on June 2, though (2012, I think it was?).
Now legal mushrooms might be a comfort forgetting the bad weather in Denver....

“Thousands frozen solid from dancing in the snow for hours with no clothes on.”

Offline Marissa

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Re: Marissa's 1972 CB500
« Reply #355 on: May 11, 2019, 07:52:51 PM »
Here's a picture of my new master cylinder assembly. Fits great.



I don't like the plastic reservoir, the mount, or the extra long hose line that connects it. So I'll be modifying those along the way.
Here's a new body I made for it.





I finally have my footpegs near completion. They're not perfect but for a school project I think it's cool. Going to patina them on Monday.
 

One of the T fittings for the carbs was broken. I looked on eBay and could not find any others for a fair price. So my current fix: filed down the broken tab, light amount of jb weld applied with a Q tip, and I found a plastic fitting tip that was the same size and cut it to fit. I put more JB weld around the seam on the outside and used layers of heat shrink to stabilize it while it cured. Waiting to see it fail at some point.





Triple Tree finally getting some paint! Hoping the lettering will be a nice subtle touch.



My zinc plating attempts have failed me. My blue chromate which I ordered off Caswell just immediately turns the zinc very dark and dull. So unfortunately I wasted a lot of time for nothing on that, and the carb linkage will be just zinc plated and dull out on its own. For now I'm not worrying about it as I'm trying to get on the road.

The carbs are fully together now and on the bike... I got the wiring together for today in hopes of another start up but something is now wrong with my start button. I have power all the way to the button however the button itself isn't triggering anything. It's a reproduction of the Honda assembly and it's likely just 2 years old with nearly no use, obviously. In the process of taking it apart to look I stripped the threads and I have a feeling this metal is too soft and junky to retap. One step forward, two steps back.

I got the starter to turn over by arcing the starter solenoid. This was promising until it pulled from the battery too much and now the battery is dead and on charge. Kick starting is not my strong suit for little 5'2" me, but I did hear good compression noises coming from it.

I'm going to check tomorrow to see if I have the posts mixed up on the starter solenoid. I could have sworn though that I haven't changed any electrical under the seat since last year, and I had the starter working fine in November... I guess we'll see what it is at some point!

1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
1972 Honda CB500 - infinite work in progress

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Offline MauiK3

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Re: Marissa's 1972 CB500
« Reply #356 on: May 12, 2019, 09:30:36 AM »
Marissa
These projects have so many steps, not all of them forward. Take it slow, no rush.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline DaveBarbier

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Re: Marissa's 1972 CB500
« Reply #357 on: May 12, 2019, 01:28:03 PM »
Great stuff Marissa. Are you going to somehow thread the new reservoir for a cap or is it just a cover?

Offline Marissa

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Re: Marissa's 1972 CB500
« Reply #358 on: May 12, 2019, 02:43:27 PM »
The new reservoir is going to have a bronze ring soldered around it which I'm gonna tap for threads. Then, I'll have a cast bronze top which will have drill holes for 2x 60 degree taper screws. At least that's the plan as of current, we are casting them tomorrow for my final project in school and I sort of have a feeling the casting will not be successful.

Here's the drawing of what I planned:

1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
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Offline Marissa

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Re: Marissa's 1972 CB500
« Reply #359 on: May 12, 2019, 02:53:09 PM »
I also just ordered a new right side switch assembly and I swapped posts on the starter solenoid earlier which was not it. It blew a fuse and would not turn over the bike in that orientation.

It started up fine in November, so I am hoping it was just the handlebar assembly. I am worried the battery is bad as I left it in the garage over the winter, and it is a lithium ion battery. Even still though I know that's not the main problem as the battery would still turn over the bike if nothing else was wrong. I did modify the handlebar switch assembly so that I could put the wiring outside the clip ons and not drill holes into them. I'm wondering if something about that made the switch no good.

 I finally made a new fender brace that keeps the fender closer to the front tire without rubbing.
1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
1972 Honda CB500 - infinite work in progress

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Offline jgger

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Re: Marissa's 1972 CB500
« Reply #360 on: May 12, 2019, 06:15:58 PM »
Marissa the foot pegs look nice, just be careful with the raised keeper on the end. That could keep you from sliding your foot off the peg when necessary like cornering if needed or coming to a stop. Having to lift your foot off of the peg is not a natural movement. Perhaps study off road or racing foot peg shapes. it would be heartbreaking to hear that you dropped your bike coming to a stop after ALL the great work and time you have invested. Just a thought.
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Offline Marissa

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Re: Marissa's 1972 CB500
« Reply #361 on: May 13, 2019, 02:10:36 PM »
Marissa the foot pegs look nice, just be careful with the raised keeper on the end. That could keep you from sliding your foot off the peg when necessary like cornering if needed or coming to a stop. Having to lift your foot off of the peg is not a natural movement. Perhaps study off road or racing foot peg shapes. it would be heartbreaking to hear that you dropped your bike coming to a stop after ALL the great work and time you have invested. Just a thought.

Thanks for the pointer, jgger! I took some photos of the finished footpeg to show its height. I think the end cap is mostly going to function as just aesthetics, based on how my foot is going to line up with it. With a relaxed foot, my shoe will sit on top of it instead of being "stuck" between the end cap and the clutch cover. Still, I may file them down further.







Also, I am a BIG idiot! Today, I cut the yellow/red line to the kill switch to see if I could test it with potentially another switch or something. I ended up trying to test the wire directly on my clip on where I sanded it down to see if it worked. No dice. Okay, what about the clip on mount on the fork? Still no dice. The fork itself? Bingo!

It was at that point that I realized, the whole clip on bars were clear coated. Even if I sanded off a part where I thought it needed ground on the handlebar switch, it still was not able to ground to the rest of the chassis because there's clear coat on the mount contact area. Ugh, duh. Why didn't I think of this before?!

So I technically just thrashed a salvageable handlebar switch. Oh well, it's a part of the learning experience.

So with the battery now fully charged, and a strong starting "switch", I actually got it to run. And it was so awesome.

It did however leak out some oil, scary but wasn't that fast or bad. Pulled off the left engine side cover and found the bottom oil pump housing bolt was a tad loose. I remember not torquing them down like crazy in fear of stripping or seizing, so it made sense. Think I may convert these to hex or hex flange bolts instead of Philips. Philips seems silly to me to keep here, also may add blue loctite so this won't be something to worry about, haha. But it's torqued down now and doesn't seem to leak anymore.

Idle needs to be higher I think based on the sound, but it revved strong and sounded quite healthy. I'm super excited to see what progress I make next.


Here's updates on the brake reservoir. The cap was not cast today because the entire city of New Haven lost power and we had to evacuate school. Thankfully with some time at home I was able to work on the bike!

« Last Edit: May 13, 2019, 05:08:27 PM by Marissa »
1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
1972 Honda CB500 - infinite work in progress

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Offline DaveBarbier

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Re: Marissa's 1972 CB500
« Reply #362 on: May 13, 2019, 03:41:51 PM »
That reservoir should look nice! I’m curious how heavy it’ll be.

For the oil pump, those aren’t Phillips but JIS. You can get much more torque with a proper JIS driver. I feel we’ve had this conversation before, haha.

If it still leaks, contact member Elan for a rebuild kit. Hope he still sells them.

Offline Marissa

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Re: Marissa's 1972 CB500
« Reply #363 on: May 13, 2019, 04:40:32 PM »
That reservoir should look nice! I’m curious how heavy it’ll be.

For the oil pump, those aren’t Phillips but JIS. You can get much more torque with a proper JIS driver. I feel we’ve had this conversation before, haha.

If it still leaks, contact member Elan for a rebuild kit. Hope he still sells them.

I keep saying Phillips out of habit, lol. I bought a new set of JIS drivers with magnetic ends which help. But I feel like I’d still be more comfortable with something I can put a wrench or socket to.

I got a rebuild kit off eBay too, pictures were on this thread somewhere but may have been deleted due to Flickr cutting free photos.

The reservoir will be heavy I’m sure. The body at the moment is fairly light though. Maybe 12oz? I’m bad at guessing what the weight could be without knowing what the casted part will feel like lol. It’ll probably negate my weight savings from my exhaust clamps, lol.
1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
1972 Honda CB500 - infinite work in progress

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Re: Marissa's 1972 CB500
« Reply #364 on: May 13, 2019, 04:41:37 PM »
That is a BIG reservoir.  You might be able to get away with 1/2 that volume.

Nice Old School skate Vans. I just bought a pair just like them for my nephew.
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)

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Offline Marissa

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Re: Marissa's 1972 CB500
« Reply #365 on: May 13, 2019, 05:00:15 PM »
Yeah, I realize it's a bit big now. I could make it shorter but I'm not sure if I'll like it proportionally.

Also, I realized my video wasn't working, so I added a link to the original post!
1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
1972 Honda CB500 - infinite work in progress

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Offline Cb750 Racer

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Re: Marissa's 1972 CB500
« Reply #366 on: May 13, 2019, 05:48:00 PM »
Bikes coming out sweet! Really a fan of all the unique bits. If you want vans handlebar grips look up "Cult Vans bmx grips" I used to run them on my BMX bike back in the day and I think they would fit the build perfectly
Turbo Billet Block cb750
1975 Honda CB400f
1972 Suzuki GT750J
1984 Kawasaki GPZ900 Mr.Turbo Top Gun build
2002 Suzuki Bandit 1200 Turbo
1979 Honda CBX
1990 Mr.Turbo Kawasaki ZX11
And Dozens More...

Offline 754

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Re: Marissa's 1972 CB500
« Reply #367 on: May 13, 2019, 06:36:04 PM »
Is your rear brake arm upside down ?
« Last Edit: May 16, 2019, 10:32:15 AM by 754 »
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Offline DaveBarbier

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Re: Marissa's 1972 CB500
« Reply #368 on: May 14, 2019, 04:46:36 AM »
Is your rear brake atm upside down ?

Hmm, it doesn’t look like it but that would mean the brake would operate off a “push” instead of a “pull”. I assume you’re talking about the 90° lever inside of the frame that the brake arm links to. I think normally it aims up but since it’s welded to the splined shaft I don’t see how it could be installed the other way.   

Offline MauiK3

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Re: Marissa's 1972 CB500
« Reply #369 on: May 14, 2019, 08:57:38 AM »
When I did my K3 750 I wanted to avoid future corrosion here on Maui so I made some changes. I used a hex head engine bolt set made from stainless. It was very nice going together and being able to use a torque wrench on them. They look great too. I know, not stock. My bike is "stockish". For some of the small fasteners such as the chain guard I bought stainless hex head bolts and polished the heads.
No corrosion!! Most of that was pretty ugly when I took it apart and I struggled with plating just as you have. I think I never quite got the control I needed to make it come out right.
It will be great to see yours completed. I know for projects like that there is really never an end but at some point you'll call it done, at least for the time being. Then you get your shot at bike of the month.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline Marissa

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Re: Marissa's 1972 CB500
« Reply #370 on: May 15, 2019, 05:50:39 PM »
For some reason, I can't post on mobile sometimes so I lost what I wrote, but I got it to idle on it's own a bit for today.

A few things:

That T fitting I rigged up earlier? Epic fail; leaking gas out everywhere, oddly though mainly when it's on reserve. My hardware store doesn't have anything like it so if anyone has one to sell please let me know. PayPal ready and shipping is to 06437. It sort of looks like the piece is a brass fitting that is zinc plated? but my metals class is over so I can't test out soldering to it.

What hardware do people use to keep the hose snug on the fittings? I think OE was just wire clamps? Or maybe nothing at all?

Another oil leak appeared, this one from the left side cam cover. Think I just need to hammer it flush to the valve cover a bit more and it should be good. It doesn't seat as well as the right side so I'm sure I just need to make it snug.

The oil pump leak seems to have disappeared for now. Though I guess I can't totally tell after gas was pouring over it from the carbs (thank god the cases are powder coated lol. Hoping the paint on my carbs is strong too, but I think my boyfriend did a good job with paint so we'll see.) Gonna get new hardware for it this weekend just to be safe.

My boyfriend borrowed my new carb synching kit, didn't even get to use it before him and he just so happened to snag it on the week I get it running, so that I should get back next week  >:( haha. I noticed that in the 2-3 minutes of idle time (Ironically got it to idle after gas poured out of the thing and was hoping to drain it out by running it) the bike held a good idle, however it sped up on it's own? And the idle got quite fast (no tach hooked up so I don't know RPMs but I could tell by sound) so I went to slowly take off the choke, it held for about 10 seconds, then died off. Is this just something to get used to?
1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
1972 Honda CB500 - infinite work in progress

Instagram- marissasimos

Offline Marissa

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Re: Marissa's 1972 CB500
« Reply #371 on: May 15, 2019, 05:53:21 PM »

It will be great to see yours completed. I know for projects like that there is really never an end but at some point you'll call it done, at least for the time being. Then you get your shot at bike of the month.

Haha, someday it is a goal to be nominated for BOTM. Lots of great builds on here and I would be honored to be amongst them!
1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
1972 Honda CB500 - infinite work in progress

Instagram- marissasimos

Offline Marissa

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Re: Marissa's 1972 CB500
« Reply #372 on: May 15, 2019, 05:57:11 PM »
Idk why these photos off my iPhone never attach like a normal jpg.





1984 Nissan 300zx - sold
2016 Ford Fiesta ST - daily
1972 Honda CB500 - infinite work in progress

Instagram- marissasimos

Offline seanbarney41

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Re: Marissa's 1972 CB500
« Reply #373 on: May 15, 2019, 06:32:08 PM »
I think I got those fuel t's for ya...those are some parts you really can't mess around with anything less than the real thing. 

These are from a rack of 022a's that were offered for free to me so just double check they are what you need and pm and we will get them headed your way.
If it works good, it looks good...

Offline DaveBarbier

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Marissa's 1972 CB500
« Reply #374 on: May 15, 2019, 06:46:21 PM »
I don’t use any hose clamps. If you use OEM size 5.5mm hose you don’t really need anything. You can get little spring clamps, but really if it fits tight there’s not much pulling force on it so it doesn’t really matter.

Behind that cam cover (I’ll call it the rocker shaft cover) there’s three places it could leak from. The two rocker shaft holes and the valve cover screw that’s in there. Tightening down the rocker shaft cover won’t do much to help the leak either way. Those o-rings that are on the dowels go into a bore. If they’re in at all then putting them deeper into the hole won’t make it a better seal. Did you replace those o-rings? The valve cover screw has two copper crush washers under it. One under the head of the screw and one under the little L bracket. Did you replace them? If not, you can try and anneal them and see if that works.

For the oil pump, honestly the JIS screws do just fine. You don’t need to buy new hardware to get more torque out of it. If it leaks, replace the o-rings. I’d hate to see a post that says you sheared off a screw or stripped out the threads in the case. Remember, there isn’t a cork gasket between it which might benefit from more “squish”. There’s metal to metal contact with an o-ring inside. If the metal of the oil pump is contacting the other metal of the case, tightening it more is just stretching the fasteners.

The racing idle could be out of sync carbs, but it could be an air leak too. Other things could cause that like poorly routed throttle cables too. BUT as the motor heats up the idle is going to increase just due to a more efficient burn. Was it increasing really fast or was it a slow increase?

Good posts lately, you’re getting close!!!