• This is a single roller, not a pair.
• Superior replacement Powerlip roller compared to stock component.
• Improve drive train speed and tension accuracy.
• Low friction material lowers drag without transferring heat.
• Exclusive Powerlip™ design makes the chain run fast and true.
• Sealed bearings are ABEC & 9002 ISO rated for superior rolling and long life.
• Includes new bike specific hardware.
• Race tested size and width for each model fitment. 
• This is not a universal roller.

Fitment:
YAMAHA (18-24) YZ 450F Lower or Upper
YAMAHA (92-23) YZ 125 & 250  upper
YAMAHA (20-23) YZ 125X Upper.
YAMAHA (16-23) YZ 250X Upper.
YAMAHA (98-02) YZ 400F, 426F, WR 400F, 426F Upper
YAMAHA (03-18) WR 450F Upper.
YAMAHA (01-18) YZ 250F Upper
YAMAHA (01-19) WR 250F Upper
YAMAHA (15-19) YZ 250FX  Upper.
YAMAHA (20-23) YZ 250FX, WR 250F Lower or Upper.
YAMAHA (03-17) YZ 450F Upper.
YAMAHA (19-23) YZ 250F, YZ 450FX, WR 450F Lower or Upper.