1987-2003 Yamaha YFZ350 Banshee supplementary service manual, Page 126Get this manual
INSPECTION AND REPAIR
I DRIVE GEAR Inspect: Drive gear and driven gear Pitting1Wear1 Damage ReplaceIt is always advisable pay strict attention the lash numbers (mark) during replacementMarks are scribed on the side of each gearMatch these marks
Drive gear Driven gear
Primary drive gear Lash number
Primary driven gear Lash number
tolerance