PISTON KIT 01-09 YFM660 102 HC, FORGED WOSSNER 8577D200

Wossner forged piston kit designed for Yamaha YFM660R Raptor and YFM660F Grizzly models, featuring a 102mm bore and 101.93mm size for high compression performance. Manufactured in Germany, this piston is engineered to enhance heat transfer, ensuring uniform expansion and even thrust load distribution. The elliptical design prevents localized pressure and piston collapse, making it ideal for high-performance applications.

Features

• High-strength forged piston for durability
• Optimized heat transfer for improved combustion efficiency
• Elliptical design to ensure uniform expansion and reduced localized pressure
• High compression ratio for enhanced engine performance
• Manufactured in Germany

Specifications

• Bore: 102mm
• Size: 101.93mm
• Part Number: 8577D200
• Compression Ratio: OEM
• OEM Compression Ratio: 19.20:1
• Lock Part Number: CW22
• Ring Set Part Number: 1020XSY
• Displacement: 660 cm³
• Stroke: 84.00mm
• Clearance: 0.07mm
• Dome Volume: +18.20 cm³
• Compression Height: 27.00mm
• Theoretical Weight: Not specified

Vehicle Fitments

• Yamaha YFM660R Raptor (2001-2009)
• Yamaha YFM660F Grizzly (2001-2009)

Dispatch Times

Local Stock: Dispatches in < 24 hours

Parts showing as available at our Warehouse in Gorey ship the same business day if ordered before 1pm. 

Supplier Stock: Dispatches in 2-4 Days

Parts showing as available at our Supplier Warehouse are ordered from our supplier and delivered to us before we can dispatch. More info is available on this page under "Stock Availability".

OEM Special Order: Dispatches in 3-10 Days

This website does not have access to live stock levels from our OEM Suppliers. In most cases the parts will be available but in the case of backordered parts we will notify you. We receive parts from Yamaha in 3-4 days, All others including Honda, Suzuki, Kawasaki, Polaris please allow 7-10 days for us to receive the parts. 

Delivery Times

Ireland & Northern Ireland:

1-2 Days using GLS/An Post

Germany, France, Netherlands, Belgium:

3-5 Days using GLS/Fedex

Italy, Spain & Other EU Countries:

4-7 Days using GLS/Fedex