Wiseco PK1778 Top End Kit - 0.50mm Oversize to 83.50mm, 8.6:1 Compression

Generally ships to addresses in the contiguous United States the same business day if ordered by 12:15PM Central Time!

Bore: 83.50mm
Compression: 8.6:1 Compression
Sizing: 0.50mm Oversize

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

Yamaha YFM400 Big Bear 2x4 2000-2004
Yamaha YFM400 Big Bear 4x4 2000-2006
Yamaha YFM400 Big Bear IRS 4x4 2007-2008
Yamaha YFM400F Kodiak 4x4 1993-1999