29-06-14, 05:50 AM
(29-06-14, 05:16 AM)Falcon 269 link Wrote: I'd advise anyone against reducing chain slack to that extent. The original manual spec was 50 - 55m but Yamaha reduced it to 45mm after a year or two of the Fazer being on sale. Any tighter than that and you risk causing damage to the gearbox internals, particularly the output shaft bearing.+1! This "solution" rears its head regularly on the forum as a possible answer to reducing "clunky" changes. Yamaha,in their wisdom specify this amount of chain slack which is necessary to avoid this damage. It is linked to the length of swingarm & the arc of movement of the rear wheel with the rear suspension. The swingarm length is designed to provide stable handling. There is always going to be a bit of a "clunk" between neutral & 1st & 1st to 2nd.
Running the chain tighter than recommmended will have expensive consequences!