VERTEX UK PISTON KIT         22591C           (Distributed by oro2u.com)

All Vertex Pistons Feature:  
- Standard pistons and components are OEM replacements.
- Kits include piston, rings, wrist pin and circlips.
- All pistons are heat treated with a T-5 or T-6 hardening and tempering cycle.
- Replacement rings are sold individually.
- Made in Italy.
- Fitted in many oem bikes as STD.

SPECIFICATION:

• BORE SIZE.   66.40mm   [C   66.37mm]

Replacement Parts.

• Rings.   53010006640
• Pin.   715372
• Clips. 72074

Cross reference numbers ONLY.

• Piston (Std) UR RED 1P8-11631-00-A0
• Piston (Std) UR ORANGE 1P8-11631-00-B0
• Piston (Std) UR PURPLE 1P8-11631-00-D0
• Piston (Std) UR GREEN   1P8-11631-00-C0
• Piston Ring Set (Std) 5CU-11603-10-00
• Pin, Piston 5UP-11633-00-00
• Circlip 93450-19052-00

MODEL FITMENT:

• YAMAHA YZ/WR 250 RACE 1999-2022 SINGLE RING