Wiseco
Wiseco Piston Kit Yamaha YFM660R + YFM660F Grizzly 9.9:1
Part number: W4966M10000
€192.21
Sales price · excluding VAT and shipping
2 available from supplierCatalogue updated: 6 Nov 2026, 08:21
Supplier stock; quantities are not reserved.Supplier stock is separate from stock physically held at Nick's Garage. Delivery to Cyprus and the final quotation are confirmed before ordering.
Technical specifications
- Bore - Standard
- 100.00 mm
- Piston Size
- 99.92 mm
- Compression Ratio - Actual
- 9.9:1
- Compression Ratio - Over Stock
- +0.7
- Total Height
- 49.20 mm
- Piston Pin Hole Diameter
- 22.00 mm
- Compression Height
- 16.00 mm
- Boss Spacing
- 29.00 mm
- Piston Head Type
- Flat
- Skirt Coating
- Armorglide Coating
- Additional Info
- 5 Valve Pockets, Forged Piston
- OEM Reference No
- 3YF-11631-00-X
- Country of Origin
- USA
- GTIN
- 00193564126436
- Piston Ring Part #
- W3937XS
- Piston Pin Part #
- WS655
- Circlip Part #
- WCW22
- Package Height
- 107,95 mm
- Package Length
- 124,46 mm
- Package Weight
- 453.59 g
- Package Width
- 124,46 mm