Name: Piston Kit 99-18 YZ250 1-RING, Wossner 8217DA 66.40 A
Brand: Wossner
SKU: 56-W742.A.WO.1R

Piston Kit 99-18 YZ250 1-RING, Wossner 8217DA 66.40 A

Wossner
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Description

This Wossner piston kit with a 66.40mm bore (actual size 66.35mm) features a single-ring piston designed specifically for Yamaha YZ250 models from 1999 to 2018. Forged in Germany, it offers durability, thermal efficiency, and reduced friction for high-performance two-stroke engines.

Features

Forged single-ring piston for reduced friction and improved response
Engineered for efficient heat dissipation to cylinder walls
Elliptical design distributes load evenly to prevent localised pressure and piston collapse
Manufactured in Germany for reliability and precision

Specifications

Bore size: 66.40 mm
Actual piston size: 66.35 mm
Display (cm³): 249
Stroke (mm): 68.00
Clearance (mm): 0.05
Compression ratio: 2-stroke (Wossner and OEM)
Compression height (mm): 38.00

Cross-Reference OEM Part Numbers

OLD No. 56-W056.WO.A

Vehicle Fitments

1999–2018 Yamaha YZ250

Included Components

Piston: Wossner PN# 8217DA (Single ring)
Gasket: PN# D2041
Lock: PN# CW18
Pin: PN# WP033
Ring Set: PN# RSB6640
Rod: PN# P2028

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YZ X 250	2016-2020
YAMAHA	YZ X 250	2016-2021
YAMAHA	YZ 250	2002-2021
SUZUKI	RM 250	2003-2012
YAMAHA	YZ X 250	2016-2019
YAMAHA	YZ 250	1999-2019
YAMAHA	YZ 250	1999-2020
YAMAHA	YZ 250	1999-2021
YAMAHA	YZ X 250	2016-2018
YAMAHA	YZ 250	1999-2018
YAMAHA	YZ 250	1999-2001
YAMAHA	YZ 250	2002-2019

Piston Kit 99-18 YZ250 1-RING, Wossner 8217DA 66.40 A

Wossner
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This Wossner piston kit with a 66.40mm bore (actual size 66.35mm) features a single-ring piston designed specifically for Yamaha YZ250... Read more

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SKU: 56-W742.A.WO.1R

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Description

This Wossner piston kit with a 66.40mm bore (actual size 66.35mm) features a single-ring piston designed specifically for Yamaha YZ250 models from 1999 to 2018. Forged in Germany, it offers durability, thermal efficiency, and reduced friction for high-performance two-stroke engines.

Features

Forged single-ring piston for reduced friction and improved response
Engineered for efficient heat dissipation to cylinder walls
Elliptical design distributes load evenly to prevent localised pressure and piston collapse
Manufactured in Germany for reliability and precision

Specifications

Bore size: 66.40 mm
Actual piston size: 66.35 mm
Display (cm³): 249
Stroke (mm): 68.00
Clearance (mm): 0.05
Compression ratio: 2-stroke (Wossner and OEM)
Compression height (mm): 38.00

Cross-Reference OEM Part Numbers

OLD No. 56-W056.WO.A

Vehicle Fitments

1999–2018 Yamaha YZ250

Included Components

Piston: Wossner PN# 8217DA (Single ring)
Gasket: PN# D2041
Lock: PN# CW18
Pin: PN# WP033
Ring Set: PN# RSB6640
Rod: PN# P2028

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YZ X 250	2016-2020
YAMAHA	YZ X 250	2016-2021
YAMAHA	YZ 250	2002-2021
SUZUKI	RM 250	2003-2012
YAMAHA	YZ X 250	2016-2019
YAMAHA	YZ 250	1999-2019
YAMAHA	YZ 250	1999-2020
YAMAHA	YZ 250	1999-2021
YAMAHA	YZ X 250	2016-2018
YAMAHA	YZ 250	1999-2018
YAMAHA	YZ 250	1999-2001
YAMAHA	YZ 250	2002-2019

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.