Description
A lighter rear sprocket directly translates to reduced unsprung weight, sharper acceleration, and improved handling—critical advantages whether you’re racing or pushing hard on technical terrain. The Renthal 50-tooth aluminum sprocket replaces wear-prone steel with 7075-T6 aluminum that’s 66% lighter while maintaining the durability needed for aggressive off-road riding. Self-cleaning tooth grooves eliminate mud accumulation that degrades performance, so you maintain consistent power transfer lap after lap.
- Chain Size: 428
- Tooth Count: 50
- Material: 7075-T6 Aluminum
- Weight Savings: 66% lighter
- Manufacturing: CNC-machined
- Self-Cleaning: Mud-shedding grooves
- Finish: Blue anodized
- Position: Rear drive
- Fitment: Yamaha specific
- Part Number: 121U-428-50GPBU
