Description
Between youth motocross tracks and practice days, the stock front sprocket on a 02-22 Yamaha YZ 85 does not last a full season, so Renthal builds this 14-tooth 428 replacement from harder steel and holds it to closer tolerances.
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.
- Made from a hardened steel alloy chosen for wear resistance under repeated chain load, not just raw hardness
- Precision CNC manufactured to Renthal tolerances, so every 14-tooth sprocket in the batch matches the last one for fit and balance
- The grooved profile carves off packed dirt before it can wedge between the chain and sprocket, a real advantage off road
- Trimmed to a lean profile that shaves unsprung weight compared to a thick stock sprocket, without cutting into the load-bearing tooth base
- Balanced for true rotation, which cuts down on the vibration and uneven wear that comes from an off-center sprocket
- Designed as a drop-in swap for the factory sprocket, keeping stock bolt spacing and center bore
- 14-tooth count on 428 chain pitch, matched to the 02-22 Yamaha YZ 85 front output shaft
A front sprocket swap is a short job on most 02-22 Yamaha YZ 85 models but still calls for the correct chain breaker or master link if the chain gets replaced at the same time. IPD Racing stocks this Renthal 428 sprocket and can advise on the full kit.
