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Author Topic: Cam Chain question on a CB400f  (Read 753 times)

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gregnsan

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Cam Chain question on a CB400f
« on: November 10, 2008, 09:41:51 am »
Looking at buying a CB400f that evidently broke its cam chain. I can't imagine that doing the crankcases any good. Has anyone seen what this does to the engine. I was a Honda mechanic many many moons ago and never saw an engine lose its cam chain. The bike from the pics I've seen looks ok although I haven't seen the exhaust yet. Any input would be appreciated.
Thanks
Greg
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Offline GroovieGhoulie

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Re: Cam Chain question on a CB400f
« Reply #1 on: November 10, 2008, 10:00:53 am »
Well I believe the engine is an interference engine, so it probably lunched one or more valves.  I've heard of the 400F camchains stretching like "knicker-elastic", but never of one snapping.

I'd think a full rebuild is in order at the very least.
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gregnsan

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Re: Cam Chain question on a CB400f
« Reply #2 on: November 10, 2008, 10:06:56 am »
Thanks for the input Groovie, I think I'll pass on the scoot. Heck I got a 74 RD350 I just picked up to restore guess I ought to just get that one done, after I finish up the 70 CL350 I'm redoing right now.
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Offline GroovieGhoulie

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Re: Cam Chain question on a CB400f
« Reply #3 on: November 10, 2008, 10:10:43 am »
Good luck on the Yammie!!! I LOVE two-strokes.  Should be awesome when you're done.
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Offline bryanj

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Re: Cam Chain question on a CB400f
« Reply #4 on: November 10, 2008, 10:23:53 am »
will need:
Cam chain---stillavailable
tensioner blade
cushion
valves 2-6
gaskets
Probably tensioner horseshoe that aint suplied anymore so re-work or used
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

gregnsan

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Re: Cam Chain question on a CB400f
« Reply #5 on: November 10, 2008, 10:37:29 am »
Yeah I'm going to keep the RD stock appearing, other than chambers but want to make a go fast out of it. It amazing what they are doing with 2 strokes these days.  Still want to pick up a 350/400 four though, what a sweetheart of an engine.
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