1975 3C build

A

adr0ck

New member
Location
USA
Hello everyone, I posted before about my rear brake and how it went together. I thought I'd start a new thread with more progress and also so I can ask more questions about different things, not just the brake. I'll start with a picture of how I purchased the bike in 2008 it was pretty rough. It had been wrecked and then sat in the guys garage for ~10 years. The 2nd picture is how I just got the bike back a month ago, after a bit of a fiasco with the guy who was supposed to be working on it for the last 5 years (he didn't do anything). But now it's build time for me. The last picture is more of less how she sits now. A lot of the wiring is done, working on putting on engine covers and other small bits. I will post below with a question that hopefully everyone can help me with. Thoughts, comments, suggestions, all is welcome!
 

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So my question is about the shift and brake pedals. This bike is left side shift. Each pedal has a copper bushing that goes in it, then a steel spacer that goes inside that. I believe the steel spacer should move (rotate) inside the bushing, is this correct? Mine doesn't, the only way to get the spacer in the bushing is to press it in, and it is frozen solid. But even if it did rotate, when you attach all to the frame, how is the pedal supposed to move? I would think the steel spacer would need to be slightly longer than the pedal and copper bushing, mine is about the same length, maybe half a mm longer. See photo, thoughts? The copper/brass bushing whatever they are, are in the pedal and the spacer sitting next to it.
 

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can't answer your brake question, but good on you for taking control of getting this bike finished and back up and running. If the fellow who had the bike for 5 years actually did any work at all you probably need to re check or re do anything he touched anyway.

what have you done about the rusting on the crank end shown in the second photo?

Paul LeClair
 
The guy didn't do anything except put the motor in the frame with 4 bolts. I have corrected that. It was just surface rust on the crank end and other parts, it came off fairly easily, the previously mentioned guy left everything in his very humid garage... The bearing and timing/advance piece that slide on there go on as they should. I am ordering a new nut that goes on there but am trying to look at all the different parts and see what else I need before I place an order with Wolfgang.
 
The bushes should be bronze, copper does not have the required wear properties.  These are pressed into the pedal and need to be a tight interference fit.

The steel inner bush should be slightly longer than the width of the pedal fulcrum and should be a smooth sliding fit.  It is fixed by the central bolt or footpeg (depending on which system is fitted) and the pedal should be able to swivel around easily.  Perhaps the bushes have been replaced at some stage and just require reaming to size.

piet
 
Ok this helps. I think I re-chromed the pedals (hard to remember). The bronze (thanks for clarifying) bushing is definitely tight in there, I pressed it in. I will have to ream them to fit the steel spacer or find/make new spacers. I really think these ones might be too short, but they are what came out of there. The bolt I have will go through the pedal, then through the footpeg into the frame. Thanks for the info. I'll update soon with progress or another question  :)
 
Rusty Spokes said:
That bike MIGHT BE my old 75 3c..what color is/was the fuel tank? The rotors were cross drilled on mine too. Engine had 4C camshafts and the H/C pistons too.
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Rusty, I had a 75 3c basket case that had 4C cams and H/C pistons.  Did you ingrave the initials RS on the inside of the pistons?
 
Rusty, I doubt this was yours. The tank is orange. The guy I got it from was in Maryland and he had owned it for quite some time. This is number 2600
 
My old 75 had 1st oversize HC pistons..don't recall if I had put RS on the pistons..might have. Cross drilled rotors and lots of small holes in the axle hardware for safety wire would be clue. Bike was originally Orange and re-painted Green. Sold the bike to a great fellow, Peter Fong, that worked with me in or about 1980. I thought the bike went to California..not sure. The bike had a factory 3-1 open exhaust. Peter also took the 3C standard exhaust as he was having problems with the cops and the loud pipe. So it may have the regular exhaust and collector. Don't think the engine number was 2600..but very close to that. 
 
Rusty Spokes said:
My old 75 had 1st oversize HC pistons..don't recall if I had put RS on the pistons..might have. Cross drilled rotors and lots of small holes in the axle hardware for safety wire would be clue. Bike was originally Orange and re-painted Green. Sold the bike to a great fellow, Peter Fong, that worked with me in or about 1980. I thought the bike went to California..not sure. The bike had a factory 3-1 open exhaust. Peter also took the 3C standard exhaust as he was having problems with the cops and the loud pipe. So it may have the regular exhaust and collector. Don't think the engine number was 2600..but very close to that. 
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This 3C #2360 had an orange tank, oversized domed pistons and 4C cams.  The inside of the pistons had 'RS' engraved.  Could this have been yours?  The cases were also painted black and most of the aluminum covers were chrome plated. 

Phil
 
That sure sounds like my old 3c..and the engine number sounds right too..although I did not paint the cases or chrome anything..that 3c is the one in my avatar back in the late 70's.
 
Rusty Spokes said:
That sure sounds like my old 3c..and the engine number sounds right too..although I did not paint the cases or chrome anything..that 3c is the one in my avatar back in the late 70's.
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Here it is Rusty

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That may well be my old bike. The calipers were reversed on mine too. Oversize HC pistons..maybe a head off a 1974..maybe titanium valve retainers, 4c cams and you should have a three into one factory mega with the machine too. If the front disc brakes are drilled and especially if some of the foam support under the seat front has been carved away (lowering me in the saddle and allowing more movement) then it most certainly the bike.

I did not paint the engine cases or have pin stripes on the tank though.
 
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