2008-2010 Kawasaki KFX450R Factory Service Manual, Page 268Get this manual
9-20 CRANKSHAFTTRANSMISSION Crankshaft
Next, correct the vertical misalignment by either driving wedge [A] in between the crank halves or by squeezing
them in vice, depending on the nature of the misalignment
CAUTION
Do not hammer the crank half at the point [B]If flywheel misalignment cannot be corrected by the above method, replace the crank pin or the crankshaft itself