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Author Topic: 350/400 top end switch  (Read 642 times)

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Offline mrenfro

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350/400 top end switch
« on: December 13, 2021, 10:07:26 AM »
anybody know if it's possible to refit the 350f engine with a 400f top end?  I was going to replace the entire engine but found problems with the lower end of the 400f engine.  Appreciate any input.
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Offline knowsnothing

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Re: 350/400 top end switch
« Reply #1 on: December 13, 2021, 12:42:05 PM »
I am pretty sure you can't just swap top ends.  Oils galleys don't line up or something along those lines.  I would be easier to just fix the 400f lower end.  Also, the 400f has an extra gear  ;)
« Last Edit: December 13, 2021, 12:43:46 PM by knowsnothing »
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1978 CB750k Green - 811 engine
1978 CB750k Blue - for sale
1974 CB375F Faded Black - had to have that 6th gear
1976 CB400F Red - in many pieces
1973 CB350F TBD - in many pieces

Offline bryanj

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Re: 350/400 top end switch
« Reply #2 on: December 13, 2021, 01:11:19 PM »
Cruzinimage oversize pistons BUTyou must getit bored carefully as the piston clearance is very tight and a lot of machinists are scared
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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!
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