Wiseco
Wiseco Piston Kit Yamaha Raptor 250+YFM250RX(11.0:1)3189XG
Part number: W4958M08100
€192.21
Sales price · excluding VAT and shipping
Not currently in supplier stockCatalogue updated: 6 Nov 2026, 08:59
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
- 74.00 mm
- Bore - Actual
- 81.00 mm
- Bore - Oversize
- 7.00 mm
- Compression Ratio - Actual
- 11.0:1
- Compression Ratio - Over Stock
- +1.5
- Total Height
- 40.40 mm
- Piston Pin Hole Diameter
- 17.00 mm
- Compression Height
- 15.00 mm
- Boss Spacing
- 23.40 mm
- Piston Head Type
- Flat
- Skirt Coating
- Armorglide Coating
- Additional Info
- 2 Valve Pockets, Forged Piston
- OEM Reference No
- 1S4-11631-20-A0
- Country of Origin
- USA
- GTIN
- 00193564126368
- Piston Ring Part #
- W3189XG
- Piston Pin Part #
- WS688
- Circlip Part #
- WCW17
- Package Height
- 105,41 mm
- Package Length
- 105,41 mm
- Package Weight
- 408.23 g
- Package Width
- 105,41 mm