2007-2009 Kawasaki KFX50 service manual, Page 74Get this manual
3INSPECTIONADJUSTMENT Inspect the wheelReplace if damage or bends Always balance the wheel when tire or wheel has been changed or replacedNever attempt even small repairs to the wheelRide conservatively after installing tire to allow it to seat itself properly on the rim
DRIVE CHAIN
SLACK INSPECTION
Before checking andor adjusting, rotate the rear wheels several revolutions and check slack at several points to find the tightest pointCheck andor adjust the chain slack with the rear wheels in this "tightest" positionToo little of chain slack will overload the engine and other vital parts; keep the slack within the specified limitsPlace the machine on level placeWheels should be on the ground without the rider on it