Name: Piston Kit 99-18 YZ250 66.40 A Wossner 8216DA Yamaha MX 2 Ring Piston
Brand: Wossner
SKU: 56-W742.A.WO

Piston Kit 99-18 YZ250 66.40 A Wossner 8216DA Yamaha MX 2 Ring Piston

Wossner
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Description

This Wossner piston kit with a 66.40mm bore (actual size 66.35mm) is engineered for Yamaha YZ250 models from 1999 to 2018. Designed and manufactured in Germany, the forged piston provides superior strength, efficient heat transfer, and reliable performance in two-stroke applications.

Features

Forged construction for high durability and mechanical strength
Optimised for combustion chamber heat transfer to cylinder walls
Elliptical design ensures even load distribution and reduces risk of piston collapse
Precision-manufactured in Germany

Specifications

Bore size: 66.40 mm
Actual piston size: 66.35 mm
Display (cm³): 249
Stroke (mm): 54.10
Clearance (mm): 0.06
Compression ratio: 2-stroke (Wossner and OEM)
Compression height (mm): 28.00

Cross-Reference OEM Part Numbers

1P8-11631-00-A0
1P8-11631-00-B0
1P8-11631-00-C0
1P8-11631-00-D0
5CU-11603-10-00
5UP-11633-00-00
93450-19052-00

Vehicle Fitments

1999–2018 Yamaha YZ250

Included Components

Piston: Wossner PN# 8216DA (2-ring)
Lock: PN# CW18
Pin: PN# WP033
Ring Set: PN# RSB6640 x 2
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 66.40 A Wossner 8216DA Yamaha MX 2 Ring Piston

Wossner
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This Wossner piston kit with a 66.40mm bore (actual size 66.35mm) is engineered for Yamaha YZ250 models from 1999 to... Read more

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SKU: 56-W742.A.WO

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Description

This Wossner piston kit with a 66.40mm bore (actual size 66.35mm) is engineered for Yamaha YZ250 models from 1999 to 2018. Designed and manufactured in Germany, the forged piston provides superior strength, efficient heat transfer, and reliable performance in two-stroke applications.

Features

Forged construction for high durability and mechanical strength
Optimised for combustion chamber heat transfer to cylinder walls
Elliptical design ensures even load distribution and reduces risk of piston collapse
Precision-manufactured in Germany

Specifications

Bore size: 66.40 mm
Actual piston size: 66.35 mm
Display (cm³): 249
Stroke (mm): 54.10
Clearance (mm): 0.06
Compression ratio: 2-stroke (Wossner and OEM)
Compression height (mm): 28.00

Cross-Reference OEM Part Numbers

1P8-11631-00-A0
1P8-11631-00-B0
1P8-11631-00-C0
1P8-11631-00-D0
5CU-11603-10-00
5UP-11633-00-00
93450-19052-00

Vehicle Fitments

1999–2018 Yamaha YZ250

Included Components

Piston: Wossner PN# 8216DA (2-ring)
Lock: PN# CW18
Pin: PN# WP033
Ring Set: PN# RSB6640 x 2
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.