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

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

Wossner
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Description

This Wossner piston kit with a 66.41mm bore (+0.01mm oversize, actual size 66.36mm) is specifically designed for Yamaha YZ250 models from 1999 to 2018. Featuring a single-ring forged design, it delivers reduced friction, reliable performance, and durability under the demands of two-stroke operation.

Features

Forged single-ring piston enhances response and reduces friction
Engineered for optimal heat transfer from the combustion chamber to cylinder walls
Elliptical design distributes load evenly and prevents piston collapse during thermal expansion
Manufactured in Germany for high precision and reliability

Specifications

Bore size: 66.41 mm
Actual piston size: 66.36 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.B

Vehicle Fitments

1999–2018 Yamaha YZ250

Included Components

Piston: Wossner PN# 8217DB (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 8217DB 66.40

Wossner
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This Wossner piston kit with a 66.41mm bore (+0.01mm oversize, actual size 66.36mm) is specifically designed for Yamaha YZ250 models... Read more

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

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Description

This Wossner piston kit with a 66.41mm bore (+0.01mm oversize, actual size 66.36mm) is specifically designed for Yamaha YZ250 models from 1999 to 2018. Featuring a single-ring forged design, it delivers reduced friction, reliable performance, and durability under the demands of two-stroke operation.

Features

Forged single-ring piston enhances response and reduces friction
Engineered for optimal heat transfer from the combustion chamber to cylinder walls
Elliptical design distributes load evenly and prevents piston collapse during thermal expansion
Manufactured in Germany for high precision and reliability

Specifications

Bore size: 66.41 mm
Actual piston size: 66.36 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.B

Vehicle Fitments

1999–2018 Yamaha YZ250

Included Components

Piston: Wossner PN# 8217DB (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.