SOHC.co.uk Forums > CB500/550

When is a motor not worth working on?

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alexdecker:
I have yet to dive into the bottom end - would start that proces in a few weeks, but if the consensus was that after 50000 miles, they weren't worth repairing anymore, I wouldn't spend my time on it. Money is not really a problem - just doing it for the fun and as a spring project. With that being said, part of the reward is of course still to complete a nice build and get to drive it quite a few miles afterwards.

So I basically asked to make sure that I don't spend my time on a fools errand by taking it apart. I have no idea if anybody has ever been in the bottom end before, or how it looks. I fixed the top end, and both cylinders and pistons were in okay condition for some more milage, but with the slack I saw in the primary chain, I am not sure it has been taken apart. There is no rattle to an extent that I think the chain is digging into the oil gallery. I have a video if the bike idling here - maybe you guys can hear something I can't?

https://youtu.be/3XW8BiG1dDk

- Alex

Oddjob:
Both of mine are in 6 figures now, yours is barely run in by comparison.

The one I'm doing now has 147000+ miles on it, my K reg was at 268000 last time I rode it, BIL is still riding it about after doing a restoration last year. If I was still young I'd be trying for 7 figures but we don't have the weather at my age to do it.

alexdecker:
Thank you all for your answers! I have gained hope for a complete restoration, and will go into the deep (bottom) end on this bike then :)

Bryanj:
Primary chain(Kawasaki identical) £70
Cam chain                                           Â£30
Cam chain tens blade                       Â£35
Cam chain tens cushion                  £30
Gasket kit                                           Â£70
Seal kit                                                £30

I would be surprised if you needed shells or bearings at all and the 550 has more clearance between primary chain and oil gallery than 500 so does not need as frequent replacement.

Its when you need shells and transmission bearings it gets uber expensive

Sesman:
Gasket goo, oil, bearing guard, paint……

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