How difficult is it to change the spline shaft that shifts the transmission? I have done many rebuilds but have never been down to crank. I think my mech skills are pretty good but I'm no GP crew member.

I had a little problem going down to Laguna this past weekend. Was stuck in third gear from the time I got off the freeway. It was fun. Shaft is almost smooth now.

Thanks

If my feeble brain has it right, its quite easy actually as you dont need to pull the transmission, just the clutch pack after dropping the oil

yeah its easy bro - clutch cover off and some minor dismantling will reveal the other end of the shaft which you can just pull through and then slide a fresh one in its place. I recommend a fresh oil seal too. Its about four years since i changed mine so i cant remember any finer details for you but i just remember it being much easier than i expected.

I got all the parts i needed off tyga and Matt wrote me a list of parts needed for a re-build and all the oil seals worth changing whilst i was at it;

Crankshaft x 1
Piston x 2
Piston Rings x 2
Piston Pin x 2
Piston Circlip x 4
Gasket, Cylinder x 2
Gasket, Head x 2
Gasket, Clutch Cover x 2
RC valve seal x 2
RC Valve Shaft E Clip x 2
Seal, Crank Left x 1
Seal, Crank Right x 1
Seal, Countershaft x 1
Seal, Gear Change Shaft x 1
Seal, clutch shaft actuator x 1
Seal, Kickstart x 1

The list maybe useful to you in future.
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Thanks guys. I was thinking it would be a lot more difficult. I'm waiting on a price from Craig at redline & will see what happens from there.