Name: Piston Kit 08-13 YFM250R 74.00, Wossner 8724DA Yamaha ATV, 1S4-11631-20-A0
Brand: Wossner
SKU: 56-W4950.A.WO

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

Wossner
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Description

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

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YFM R RAPTOR 250	2008-2013
YAMAHA	XT 250	2013-2020

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

Wossner
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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).... Read more

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SKU: 56-W4950.A.WO

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Description

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

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YFM R RAPTOR 250	2008-2013
YAMAHA	XT 250	2013-2020

Shipping & Delivery

How long will my item take to arrive?

Orders are typically dispatched within 1 working day and are shipped on a 24hour (non-guaranteed) service.

Where do you ship to?

We currently only ship orders within the UK.

How can I track my order?

Once your order has been dispatched, you will receive a tracking code. Tracking information is emailed to the email address that was provided when placing the order.

Can I collect my order?

Unfortunately we do not offer order collections from our fulfilment centre.