Wiseco PK1590 Top End Kit - 0.50mm Oversize to 90.50mm, 9.5:1 High Compression

Bore: 90.50mm
Compression: 9.5:1 High Compression
Sizing: 0.50mm Oversize

SPECIFICATIONS.
Displacement: 437cc.
Bore - Standard: 90.00mm.
Bore - Actual: 90.50mm.
Bore - Oversize: 0.50.
Stroke: 68.00mm.
Compression Ratio - Actual: 9.5:1.
Dome Volume: +5.0cc.
Note: Cylinder boring required.
ITEM CONTENTS.
4825M09050 - Honda TRX450ES Foreman 98-04 9.5:1 CR.
9050XX - 90.50MM RING SET.
CW19 - ROUND WIRE PIN LOCKS 19MM (PAIR).
S660 - PistonPin 19mm x 1.986in. NonChromed SW.
W6371 - TopEndGsktKit Honda TRX450 Foreman 92mm.

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:

1998-2004 Honda TRX450FE FourTrax Foreman ES
1998-2004 Honda TRX450FM FourTrax Foreman S