Checking Bottom End for wear on 4 stroke??

[yammieman]

Hey there. Im just wondering if there is any way to test a dirt bike for bottom end wear without actually splitting the case??
I know the best way to find out is by splitting the case but I mean is there any tests I can run on the bottom end to get a general idea? Or are all the tests like leak and compression tests mainly just for checking top end wear?

 

[_JOE_]

You'd be looking for looseness up and down at the flywheel/primary gear/lower conrod. The bearings should also feel nice and smooth when turned by hand.

 

[yammieman]

Well thanks mate but I did say without splitting the crank

 

[_JOE_]

I know. No splitting required. Just pull the top end, ignition cover and right side cover/clutch/water pump.