is it possible to shim the kick start shaft while the gearbox is mounted in the motorcycle? I should have paid more attention when rebuilding the gearbox, but didn’t. It looks like I can pull the outer and inner covers in place. I’m worried about how to rotate the shaft sprocket when fitting everything back. I REALLY don’t want to pull the gearbox. End play is significant. I haven’t put a dial gauge on it but probably close to .050”. Thanks.