Question about 1970 Honda CB 100
The bike has a bent shift fork. This means the engine comes out and must be totally torn down to fix the bad fork. The top end comes apart, the flywheel, electrics, shift shaft, clutch, main drive gear, kick starter, shift drum index wheel assembly all come apart then the gearbox gets split open for access to the shift drum and forks. This is not a job for the home mechanic. You have a few more problems I had best mention.
Most bike shops will not repair a bike more than 10 years old. Your bike is almost 40 years old. At today's repair rates it would cost around $500 to $600 for a shop to do the repair. That is probably more than the bike is worth. I searched the web and found a source for the original Honda shift forks. In round numbers they are $40 each. You should only need one fork. There is so much that should be done, all new bearings and seals, piston and rings, valve guide seals, and valves re-seated. Getting a gasket set could be a problem also. If I personally had the bike and it was really clean and nice, I would fix it up. But bear in mind, I have the tools and know how to do it in just a few hours and all it would cost me is the cost of parts. Paying the shop charges is the killer here.
A “very helpful” rating for this answer? Thanks!
Posted on Jun 24, 2009
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Posted on Jan 02, 2017
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