Done 600 miles on this engine with the Athena top end and gearbox was fine
Started it up today and was in neutral as usual , put it in first no problems and went up drive a few times and rolled back , repeat
Then I was selecting the gears with engine running at standstill and have lost 1st and second and neutral and 3rd , can go into 6th and 5th and 4th then it won't budge and is in a false neutral and not showing neutral light
I have been chasing a noise on this and had changed the primary gears again but the noise remained and now thinking is it a gearbox issue ?
Rocking the bike is not getting it into gear either
Last Edit: Mar 29, 2021 16:25:23 GMT 1 by headcoats
take the clutch side off and check the gear selector shaft and the star on the selector drum, had one do that a few weeks back, turned out to be the star had been modified (peaks smoothed down) and the selector fork was really worn and wobbly, plus the pin holding the star in place was missing, all of that wear/movement meant it didn't go into gear, sorted it and was perfect after that - exact same fault you describe, especially trying to go back down the box from 6th