Wiseco 4939M08500 Piston Kit - 0.50mm Oversize to 85.45mm, 11:1 Compression

Bore: 85.45mm
Compression: 11:1 Compression
Sizing: 0.50mm Oversize

SPECIFICATIONS.
Displacement: 426cc.
Bore - Standard: 84.50mm.
Bore - Actual: 85.00mm.
Bore - Oversize: .50mm.
Stroke: 75.00mm.
Compression Ratio - Actual: 11:1.
Dome Type: Dished.
Skirt Coating: Moly.
ITEM CONTENTS.
8500XX - 85.00MM RING SET.
CW20 - ROUND WIRE PIN LOCKS 20MM (PAIR).
S520 - PistonPin 20mm x 2.362in. NonChromed TW

All Wiseco Pistons are forged from high silicon, low expansion aluminum which offers superior strength, reduced weight, improved heat transfer, and longer life. Diamond turned finish from one of the many CNC computer controlled turning centers guarantees you a perfect finish with no size variation. Wiseco pistons can be installed in any of todays cylinder bore compositions. Wisecos state-of-the-art computerized manufacturing facility is dedicated to supplying both the high-perfomance racer and recreational enthusiast with the finest forged piston available in todays market place.

Vehicle Fitment:

2007-2008 Yamaha YFM450 Grizzly 4x4 Auto
2011-2014 Yamaha YFM450 Grizzly 4x4 Auto
2011-2014 Yamaha YFM450 Grizzly 4x4 Auto EPS
2009-2010 Yamaha YFM450 Grizzly 4x4 Auto IRS
2018-2022 Yamaha YFM450 Kodiak 450
2018-2022 Yamaha YFM450 Kodiak 450 EPS
2019-2022 Yamaha YFM450 Kodiak 450 EPS SE
2003-2006 Yamaha YFM450F Kodiak Auto 4x4
2006-2010 Yamaha YFM450FX Wolverine 4x4
2006-2009 Yamaha YXR45F Rhino 450
2007-2008 Yamaha YXR45F Rhino 450 Special Edition