Wiseco PK1055 Top End Kit - 0.50mm Oversize to 71.50mm, 8.7:1 Compression

Bore: 71.50mm
Compression: 8.7:1 Compression
Sizing: 0.50mm Oversize

SPECIFICATIONS.
Displacement: 233cc.
Bore - Standard: 71.00mm.
Bore - Actual: 71.50mm.
Bore - Oversize: 0.50mm.
Stroke: 58.00mm.
Compression Ratio - Actual: 8.7:1.
Note: Cylinder boring required.
ITEM CONTENTS.
2815XC - 71.50 mm Ring Set.
4675M07150 - Yamaha YFM250 Timberwolf 90-00 8.7:1 CR.
CW18 - ROUND WIRE PIN LOCKS 18MM (PAIR).
S278 - PistonPin 18mm x 2.472in. NonChromed TW.
W5745 - TopEndGsktKit Yam YFM/YFB250 90-09 73mm.

Contains all the necessary components for overboring or rebuilding your top end. Feature forged pistons, rings, wrist pins, circlips and top end gasket set.

Vehicle Fitment:

1992-1998 Yamaha YFB250 Timberwolf 2x4
1994-2000 Yamaha YFB250FW Timberwolf 4x4
2000-2002 Yamaha YFM250 Bear Tracker