1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 290Get this manual
REAR DRIVING MECHANISM Tighten the cover bolts in or steps until the cover evenly touches the gear caseThen, while rotating the drive pinion, tighten the bolts to the specified torque in 2-3 steps in crisscross patternTORQUES: 10 mm bolt: 48 N'm (4.8 kg-m, 35 ft-Ib) mm bolt: 26 Nm (2.6 kg-m, 19 ft-Ib) CAUTION
It is important to turn the pinion while tightening the boltsIf the ring gear spacer is too thick, the gears will lock after only light tightening
Remove the oil filler cap from the final drive case Rotate the ring gear several times in both directions of rotationCheck the gear tooth contact pattern through the oil filler holeThe pattern is indicated by the Prussian Blue applied to the pinion before assemblyContact is normal if the Prussian Blue is transfered to the approimate center of each tooth and slightly to the flank sideIf the patterns are not correct, remove and replace the pinion spacerReplace the pinion spacer with thicker one if the contacts are too high, toward the face