beardy2000 Posted May 7, 2019 Report Share Posted May 7, 2019 Hi All, I'm building a B40 trials bike and wonder if you could help with primary and secondary sprocket selections? i don't have a crank primary sprocket or gearbox output sprocket yet or a rear wheel sprocket. any help would be much appreciated and save me some money and a lot of time getting it right! cheers Michael Quote Link to comment Share on other sites More sharing options...
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