PISTON KIT 99-18 YZ250 66.40 A, NAMURA NX-40025 YAMAHAYAMAHA YZ250 1999 2020, YAMAHA Tri Z 250 1985 1989, (Namura Part no NX 40025) Namura 66. 40mm piston kit PISTON RING INFO. RING NX 10025R

0mm piston Two 2677CD rings Two CW18 circlips One S508 wrist pin

so the engine can be rebuilt with total confidence

(1) 32x42x6 seal

Compression Height (mm): 33

Center To Center (mm):125

The socket is compatible with both 3/8" square drives and 17 mm wrenches

Piston (Standard): 5X5-11631-00-94

Manufactured from forged SAE 4340 Chrome Moly Steel for maximum strength and durability

Wossner Piston Yamaha YZ250 70mm Bore (PN# 8133D200)

1998 Yamaha YZ250

screws etc

Compatible with radiator necks ranging from 20 mm to 24