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Wiseco Piston Kit 10.5:1 Yamaha YFM400F Grizzly 2007-2008 40076M08500

Part Number: 09103168
WISECO
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SKU:
09103168
MPN:
40076M08500
Condition:
New
Availability:
Ships Same Business Day
Weight:
1.00 LBS
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$221.95
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Description

If you're running a 2007-2008 Yamaha YFM400F Grizzly and want measurable performance gains, a high-compression piston kit is one of the most direct upgrades available. The Wiseco 10.5:1 compression ratio increases power output and throttle response without requiring major engine modifications—just a straightforward piston swap. For riders who demand reliability under load, this precision-engineered kit delivers the durability needed for both trail riding and competitive use.

  • Compression Ratio: 10.5:1
  • Vehicle Fitment: YFM400F Grizzly 2007-2008
  • Manufacturer: Wiseco
  • MPN: 40076M08500
  • Installation: Bolt-on
  • Materials: Forged aluminum
  • Precision engineered fit
  • Gasket set sold separately
  • Standard tools required
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Specs

DISPLACEMENT:
401 CC
BORE SIZE METRIC:
85.00 MM
COMPRESSION RATIO IMPERIAL:
10.5:1
PISTON MATERIAL:
ALUMINUM ALLOY
PISTON MATERIAL:
FORGED
STROKE LENGTH METRIC:
71.50 MM
BORE - OVERSIZE:
STANDARD
BORE - OVERSIZE METRIC:
STANDARD
ENGINE TYPE:
4-STROKE
PRODUCT NAME:
PISTON
RIDING STYLE:
ATV
UNITS:
EACH
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Fitment

Fitment for Wiseco Piston Kit 10.5:1 Yamaha YFM400F Grizzly 2007-2008 40076M08500

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