2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 129Get this manual
ADJUSTING THE TOE-IN
Measurement steps: NOTE: Before measuring the toe-in, make sure that the tire pressure is correct Mark
both front tire tread centersRaise the front end of the machine so that there is no weight on the front tiresFace the handlebar straight aheadMeasure the width between the marksRotate the front tires 180 until the marks are exactly opposite one anotherMeasure the width between the marksCalculate the toe-in using the formula given belowToe-in