Hi there (newbie) looking for a little help i have a r1 2001 and the gearbox has just went i have it stripped down and looks like 3rd/4th pinion gears are gone and 4th wheel gear on the other shaft, after getting prices for the gears think second hand is the way to go. looking on ebay there is a few for sale but was wondering if anyone knows if the 5jj is the same as the 4xv or if there is others available. hope you can help mark thanks

Welcome Kirky, i"v a few friends with this model R1 , but they havn"t had any issues with gears, What sort of milage has your done ? has it been track bike,

Will ask if the boxes [ components] are interchangable.

Thanks for reply buddy its done 30000 well looked after, but i do use it on the track mostly 1/4 mile.cheers