My bike broke on Sunday, 4th gear was slipping and was obviously knackered so I packed up and went home.
The mender split the engine today and it turns out that four gears are knackered, plus a broken fork and the selector drum is knackered.
He reckons about £600, the gears are about £90 each.
I was going to get the engine rebuilt at the end of the season but never bothered because it seemed to be fine.
He did say there was no point in replacing the piston as it appeared brand new.
Clutch looks ok too.
I reckon I did about 15-18 races last year, plus about half a dozen practise days.
So in terms of hours of actual use I'd say altogether its done about 30-35hrs of use.
Admittedly hard use as its been raced for most of those hours, but it still seems a lot of wear.
I reckon I broke the selector fork when I tried to drop into 4th and gas it but it felt like it hadn't located, so I stamped it down, the torque on the engine probably meant the gear wouldn't slide properly and against that and my boot stamping it down it probably snapped.
But I didn't think I was that much of a butcher than I'd do 4 gears in 30hrs of use.