SOHC.co.uk Forums > CB750

drive chain

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Phil:
Beware!! Not all swinging arms are interchangeable. The K7 hub/ swing arm is wider and longer than the K6. I think this was to accommodate that  wider 17 inch tyre on the K7. Phil

Voxonda:
That's right, and the F2/K7 have also wider bearings at the outgoing shaft (sorry for my bad enlish here) to cope with the altered chain position caused by the wider rim/tyre combo.

Phil:
This is of interest to me! I have been advised to use a 2.75 (or preferably 3 ) inch wide rim on the rear wheel in order to be able to use the best racing tire section. I am concerned that if I fit this wide rim and tire, the chain will foul the edge of the tire. The engine is based on a K7, the frame a K4. I have swinging arms from the K7 and the K4. I have rear hubs from the K7 and K4. Would using the K7 swinging arm and the K7 rear hub provide more clearance for the chain? Thanks guys!! Phil

Voxonda:
Hey Phil,

You can always use a set of off-set sprockets.

10 or 20 m/m off-set.

Cheers, Rob

Bryanj:
530 not 520 chain on the early ones Steve

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