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Drive chain driving me nuts.

cbhonda

CB750 Member
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Coarsegold, Ca
A friend of mine gave me a '79? CB750. SALVAGE.The vin #is missing and was issued a Ca DMV assigned #. The motor # is RCO1E-2003323. The chain listed for 1979 cb750k is a 630OS, I ordered a 630 master link on line only to find out that it was too big. after checking the rear sprocket, 408/412S-39. which seems to be for a 530 chain. Did Honda change change the chain size on later CB750K models or could have been the previous owner.

Richard...:confused:
 
630/530 chain 1979 only

My understanding is most, or all of 1979 was 630. There was a change in size to 530 at the earliest, the end of the 1979 production run, and at the latest all 1980 models.
 
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