PISTON KIT 01-04 YFM660 101.00, WOSSNER 8507D100 YAMAHA ATV
PISTON KIT 01-04 YFM660 101.00, WOSSNER 8507D100 YAMAHA ATV
This Wossner Piston Kit features a 101mm bore (oversize +1.00) and is specifically designed for Yamaha XTZ660 and select ATV models. Engineered with a forged construction for maximum strength and longevity, this piston delivers precise thermal performance and uniform thrust load distribution. Its elliptical design and superior metallurgy make it ideal for high-performance and heavy-duty applications. Made in Germany.
Features
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Forged design ensures enhanced durability and strength
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Optimised heat transfer from the combustion chamber to cylinder walls
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Elliptical profile distributes load evenly and reduces risk of piston collapse
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Manufactured in Germany
Specifications
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Bore: 101.00 mm
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Measured Bore: 100.93 mm
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Clearance: 0.07 mm
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Compression Ratio: OEM
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OEM Compression Ratio: 9.20:1
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Dome Volume: -0.30 cm³
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Compression Height: 27.00 mm
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Display: 660 cm³
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Hub Stroke: 84.00 mm
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Part No.: 56-W8507+100.WO
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Piston Kit Model: 8507D100 (+1.00)
Vehicle Fitments
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Yamaha XTZ660 Tenere 1991–1998
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Yamaha XTZ660 Raptor 1991–1998
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Yamaha YFM660R Raptor 2001–2009
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Yamaha YFM660F Grizzly 2001–2009