Fed up of reading about pattern camchain rollers failing prematurely on the USA site ..its worrying me. So I am going to donate a brand new one I got from DS that fits both the CB750 and CB250/350 models to see how it fares up to the standard professional (ASTM) tests done in the rubber processing industry. DS assured me last year that he has never had any complaints but won't divulge the tech spec so gonna find out for myself. Definitely not going to buy any Cruzinimage rubber parts (rollers, inlet rubbers, gasket sets) , just hoping DS has specced & sourced wisely.