Hooked up the crankcase breather after spending weeks trying to find it , it had dropped behind a shelf , so was very hard to find . Put on the oil tank and fitted the new sprocket ( 530 ) . As absolutely nobody offered me any advice , I bought a set for a 77 honda . The rear fits perfect , but the front is double shouldered , so I will be getting it machined to match the 630 fronts single shoulder . Still waiting for those harness connectors , so when they turn up I can swap them and do the harness . Little steps , but getting there slowly