SOHC.co.uk Forums > CB750

dont let this happen

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Spitfire:
Nasty, saw a lot of them back in the olden days, snapped cams seemed to be very common, the cam and holders from the states look like a bargain as the last time I looked just one new cam holder from CMS was

davepainter:
Hi  Den thanks message ref spares prices, on that note i,ve just bought a very clean f2 to use as an engine doner shame to split a nice bike BUT i will run f2 for a while set timing balance carbs etc check she runs well then at least i can USE chop. with what i sell rolling chassis f2 for it will work out much cheaper than a ground up engine rebuild.If so then i can also sell whats left of k6 engine along with as new cam and carriers.
i will post pictures of f2 when she arrives fingers crossed!
as uk pete noticed f1 f2 prices are rising they dont make them anymore? look on e-bay at moment mint 1978 f2 in black gorgeous.
best wishes dave
ps some help needed advice as to fitting f2 lump to k6 chokes different etc electrics?

Bryanj:
With the problems F2's have with valve guides i would stick with the engine rebuild mate

hairygit:
Use the F2 carbs with it, electrics are the same for your needs, the main problem you will have is the exhaust on your chop (K6 engine) wont fit straight on (different at the exhaust port mounting)

K2-K6:
At least you'll have enough room to get the head off easily to fix the guides!

Thought the K6 exhaust stubs may fit to F2 head in place of standard F2 studs and header combination but you'd have to check it through for yourself.

I'd say the K1-6 and F1 motors are much better for cruising than F2 if that affects your decision.

F2 runs quite lean as standard and gets going a bit as you open throttles (additional fuel pumped as you turn the throttle) but you may not like that feel if you just want to mooch around.

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