2002 Bombardier Quest 650XT Service Manual, Page 124Get this manual
Section 03 ENGINE Subsection 09 (CRANKSHAFTBALANCER SHAFT)
CRANKSHAFT
Removal
Remove: balancer shaft shim no3
shim no2
R610motr70A
1Shim on PTO side
Inspection
R610motr68A
Replace crankshaft if the gears are worn or otherwise damaged
1Shim on MAG side