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PISTON KIT 08-13 YFM250R 74.00, WOSSNER 8724DA YAMAHA ATV, 1S4-11631-20-A0
  • PISTON KIT 08-13 YFM250R 74.00, WOSSNER 8724DA YAMAHA ATV, 1S4-11631-20-A0
  • PISTON KIT 08-13 YFM250R 74.00, WOSSNER 8724DA YAMAHA ATV, 1S4-11631-20-A0
  • PISTON KIT 08-13 YFM250R 74.00, WOSSNER 8724DA YAMAHA ATV, 1S4-11631-20-A0
  • PISTON KIT 08-13 YFM250R 74.00, WOSSNER 8724DA YAMAHA ATV, 1S4-11631-20-A0
Piston Kit 08-13 YFM250R 74.00, Wossner 8724DA Yamaha ATV, 1S4-11631-20-A0

Piston Kit 08-13 YFM250R 74.00, Wossner 8724DA Yamaha ATV, 1S4-11631-20-A0

£171.27 GBP
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The Wossner 8724DA forged piston kit with a 74.00mm bore is designed for Yamaha YFM250R Raptor (2008–2013) and YBR250 (2008–2012). Manufactured in Germany, this high-compression piston enhances strength and heat transfer performance. Its elliptical shape ensures even pressure distribution during thermal expansion, reducing the risk of piston failure.

Features

  • Forged high-compression piston for durability and performance
  • Engineered for efficient heat transfer to cylinder walls
  • Elliptical design ensures uniform pressure distribution during heat expansion
  • Reduces localized stress and risk of piston collapse
  • Manufactured in Germany

Specifications

  • Bore: 74.00 mm
  • Actual Bore Diameter: 73.95 mm
  • Hub Stroke: 58.00 mm
  • Clearance: 0.05 mm
  • Compression Height: 23.50 mm
  • Dome Volume: +2.40 cm³
  • Wossner Compression Ratio: 12.00:1
  • OEM Compression Ratio: 9.50:1

Cross-Reference OEM Part Numbers

  • Piston: 8724DA
  • Lock: CW17
  • Pin: WP083
  • Ring Set: 740XDS
  • Part No.: 56-W4950.A.WO
  • OEM Reference: 1S4-11631-20-A0, 40078M07400

Vehicle Fitments

  • Yamaha YFM250R Raptor 2008–2013
  • Yamaha YBR250 2008–2012