Name: Piston Kit 77-78 YZ400 87.00, Wossner 8264D200 Yamaha MX, 77-78 IT400
Brand: Wossner
SKU: 56-W550_2.00.WO

Piston Kit 77-78 YZ400 87.00, Wossner 8264D200 Yamaha MX, 77-78 IT400

Wossner
Share
- WhatsApp
- Deel
- X
- Pin it
- Messenger
- Email

Description

This Wossner piston kit features an 87mm bore size (86.92mm actual) and is designed for Yamaha YZ400 and IT425 models from 1977 to 1978. Manufactured in Germany, the forged piston is engineered for high durability and optimised heat transfer. Its elliptical design supports even load distribution during thermal expansion, reducing localised pressure and preventing piston collapse.

Features

Forged construction for maximum strength
Elliptical design distributes thrust loads evenly under expansion
Engineered for efficient combustion chamber heat transfer
Made in Germany

Specifications

Bore Size: 87mm (86.92mm)
Display: 398 cm³
Stroke: 70.00 mm
Clearance: 0.08 mm
Compression Height: 35.00 mm
Compression Ratio: 2-stroke (Wossner and OEM)

Cross-Reference OEM Part Numbers

Piston Kit: 8264D200
Lock: CW18
Pin: WP042
Ring Set: RSC8700 x2
Part No.: 56-W550_2.00.WO

Vehicle Fitments

Yamaha YZ400 1977
Yamaha YZ400 1978
Yamaha IT425 1977
Yamaha IT425 1978

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YZ 400	1977-1978
YAMAHA	IT 425	1977-1978

Piston Kit 77-78 YZ400 87.00, Wossner 8264D200 Yamaha MX, 77-78 IT400

Wossner
Share
- WhatsApp
- Deel
- X
- Pin it
- Messenger
- Email

Product form

This Wossner piston kit features an 87mm bore size (86.92mm actual) and is designed for Yamaha YZ400 and IT425 models... Read more

Out of stock

£0.00 Incl. VAT

Guaranteed secure & safe checkout.

SKU: 56-W550_2.00.WO

Free shipping on all orders above £75

No hassle returns within 30 days

Description

This Wossner piston kit features an 87mm bore size (86.92mm actual) and is designed for Yamaha YZ400 and IT425 models from 1977 to 1978. Manufactured in Germany, the forged piston is engineered for high durability and optimised heat transfer. Its elliptical design supports even load distribution during thermal expansion, reducing localised pressure and preventing piston collapse.

Features

Forged construction for maximum strength
Elliptical design distributes thrust loads evenly under expansion
Engineered for efficient combustion chamber heat transfer
Made in Germany

Specifications

Bore Size: 87mm (86.92mm)
Display: 398 cm³
Stroke: 70.00 mm
Clearance: 0.08 mm
Compression Height: 35.00 mm
Compression Ratio: 2-stroke (Wossner and OEM)

Cross-Reference OEM Part Numbers

Piston Kit: 8264D200
Lock: CW18
Pin: WP042
Ring Set: RSC8700 x2
Part No.: 56-W550_2.00.WO

Vehicle Fitments

Yamaha YZ400 1977
Yamaha YZ400 1978
Yamaha IT425 1977
Yamaha IT425 1978

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer	Model	Years
YAMAHA	YZ 400	1977-1978
YAMAHA	IT 425	1977-1978

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.