YZF 250 Piston swap

[250JackHammer]

Does anyone know if you have to take the cams out to do a piston swap.
Can you just remove the cam gears and chain, pull the head, then the jug.

What’s involved in changing the piston and rings.

Thanks

 

[Rich Rohrich]

The cams have to be removed to pull the cam chain and the top end.

The Yamaha manual has a very complete explanation of the procedure.

 

[yz250-effer]

Yes, I guess the piston is underneath the cams and cam chain. ;) This would make their removal a necessary procedure. Just get those cam dots and links between correct (while you have it TDC) and it should start up again with no problems. Torque those bolts correctly!