SOHC.co.uk Forums > SOHC Singles & Twins
CB350 1971 Restoration Project
Laverda Dave:
Good progress Ben. That bearing is the worst I have ever seen! The
guy who owned the engineering shop I used to use for rebores (now defunct) was working on a cam bearing shell conversion just before he closed down. He was having trouble getting the clearance correct and staying in place and not spinning when the engine got hot. Hopefully someone will be able to advise of the clearance you need.
BenPowell:
--- Quote from: florence on May 11, 2022, 09:13:55 PM ---My CB250K had phosphor bronze bushes put in as a modification. I replaced them in 1985 with standard ones as they had worn out. I don't know how long they had been in there as they had been done by the previous owner but they looked like a good bit of work. I still have them somewhere, will try to dig them out.
--- End quote ---
If you find them some pics would be great, just to see roughly how they look, I plan on putting some miles on the bike and as I said I was lucky enough to to get a NOS cam shaft so I want to make it last.
--- Quote from: Laverda Dave on May 11, 2022, 09:15:40 PM ---Good progress Ben. That bearing is the worst I have ever seen! The
guy who owned the engineering shop I used to use for rebores (now defunct) was working on a cam bearing shell conversion just before he closed down. He was having trouble getting the clearance correct and staying in place and not spinning when the engine got hot. Hopefully someone will be able to advise of the clearance you need.
--- End quote ---
Yeah it’s quite rough, when I got the bike there was a screw missing from the side cover, which caused an oil leak, so guessing it’s been run low for some time, only 8000 miles on it though, on the other hand the leaking oil kept the frame from rusting.
I’ve got an idea on how to get it to stay in place, it would be a case of making the bush thick enough that when pushed into the housing I can make a drilling on the join line and insert a dowel then finish bore it to size, and for improved lubrication i can cut a spiral into the bush to get the oil flowing better, or even a couple radial grooves might help. Clearances are important to get right, I know a lot about clearances for water hydraulic bearings but not oil unfortunately
BenPowell:
Hi everyone,
Been a while since I’ve put some progress photos up, had a fairly busy summer so far so probably not as far along as I’d like to be.
Engine is now back in the frame, got a few little bits to sort out before it’s complete, currently working my way through the wiring loom quite a long job since I’m mechanically biased, but getting there.
I’m really happy with the way the bike is looking so far.
Question: the bike is imported so will need a dating certificate and registering etc has anyone done this before the bike is fully completed and did it cause any problems, I’m keen to get it done so as soon as it’s ready I can get insured and out on the road
Thanks
McCabe-Thiele (Ted):
Coming along nicely you must be well chuffed.
Bryanj:
As long as you have the Nova paperwork and a dating leter from VJMC(Honda wont do imorts any more) there is a possibility dvla might want to view the bike but they dont do all and you cant predict till you apply so i would get close to finish and apply. HINT keep quality copies of all paperwork you send in
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