alex I have 2 of them one on the road and a spares bike. the road bike has redeveloped the perpencity to jump out of 2nd gear especailly when reved out. If your machine has had the same symtoms you will be faced wiyh strip down and parts location. by all means email me and I will try to answer any questions plus I should be able to send you a exploded view
paulc@quicksilver.net.nz