2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 352Get this manual
3D-18 Propeller Shafts: Tooth Contact! CAUTION
Make sure to check the backlash after the tooth contact has been adjusted, since it may have changedAdjust the tooth contact and backlash until they are both within specificationIf the correct tooth contact cannot be maintained when adjusting the backlash, replace the rear output shaft drive and driven bevel gears1) Remove the special tool and rear output shaft from the left crankcase2) Clean and degrease several teeth of the drive and driven bevel gears, and then apply coating of machinist's layout dye or paste to several teeth of the driven bevel gear3) Install the rear output shaft4) Rotate the rear output shaft several turns in both directions5) Remove the rear output shaft and inspect the coated teeth of the drive bevel gearThe tooth contact pattern should be correct as shown in example (2)If tooth contact is found to be incorrect (examples (1) and (3)), the shim thickness between the drive bevel gear and bearing must be changed and the tooth contact re-checked until correct (examples (2))Tooth contact Shim adjustment Contact at tooth top (1) Increase shim thickness Contact at tooth root (3) Decrease shim thickness