Wiseco PK1241 Top End Kit - Standard Bore 77.00mm, 12.7:1 Compression

Bore: 77.00mm
Compression: 12.7:1 Compression
Sizing: Standard Bore

SPECIFICATIONS.
Displacement: 250cc.
Bore - Standard: 77.00mm.
Bore - Actual: 77.00mm.
Bore - Oversize: STD.
Stroke: 53.6mm.
Compression Ratio - Actual: 12.7:1.
Note: Nikasil Bore.
ITEM CONTENTS.
4872M07700 - Yamaha YZ250F 01-04 12.7:1 CR 7700XU.
7700XU - 77.00 mm Ring Set .9 X .8 X 1.5mm.
CW16 - ROUND WIRE PIN LOCKS 16MM (PAIR).
S742 - PistonPin 16 x 41.91mm NonChromed SW.
W5921 - TopEnd Gskt Kit Yamaha YZ/WR250F 01-13.

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:

2001-2004 Yamaha WR250F
2001-2004 Yamaha YZ250F