Description
A front sprocket takes more direct abuse than almost any other part on a 02-22 Yamaha YZ 85, and this Renthal 13-tooth 428 unit is machined specifically to survive youth motocross tracks and practice days.
This is the grooved GP-style sprocket, so the self-cleaning channel design is built into the tooth face rather than added as an afterthought.
- Cut from through-hardened steel stock so the tooth face resists the rounding and hooking that ruins cheap sprockets after a few hard rides
- CNC cut to keep concentricity and tooth spacing consistent across the whole run, which is what actually stops a sprocket from wobbling at speed
- Grooved tooth faces shed debris on the fly, which keeps chain wear consistent even when the bike is buried in mud or loose sand
- Machined to remove excess material without weakening the tooth root, keeping rotating mass down where it matters most
- Held to strict concentricity standards so the chain runs on a true circle instead of pulsing tight and loose through every revolution
- Direct bolt-on replacement using the stock mounting pattern, no spacers or modified hardware required
- 13-tooth count on 428 chain pitch, matched to the 02-22 Yamaha YZ 85 front output shaft
Torque specs and bolt patterns follow the factory service manual for the 02-22 Yamaha YZ 85, and this Renthal 13-tooth 428 sprocket is machined to match that hardware exactly. IPD Racing ships it from stock with fitment support included.
