Piston Kit 77-78 YZ400 86.00, Wossner 8264D100 Yamaha MX, 77-78 IT400

Piston Kit 77-78 YZ400 86.00, Wossner 8264D100 Yamaha MX, 77-78 IT400. Find the product specifications and compatibility information below.

Product details

• Product: Piston Kit 77-78 YZ400 86.00, Wossner 8264D100 Yamaha MX, 77-78 IT400
• Part number: 56-W550_1.00.WO
• Brand: Wossner
• Forged construction for enhanced structural integrity
• Elliptical design ensures uniform load distribution under heat expansion
• Promotes efficient heat transfer from combustion chamber to cylinder walls
• Manufactured in Germany
• Bore Size: 86mm (85.92mm)
• 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: 8264D100
• Lock: CW18
• Pin: WP042
• Ring Set: RSC8600 x2
• Part No.: 56-W550_1.00.WO

Vehicle fitment

Applications listed in the supplier fitment data:

• YAMAHA YZ 400cc — 1977–1978
• YAMAHA IT 425cc — 1977–1978

Match your exact make, model, year and specification before ordering.

Why buy from FDY Performance?

FDY Performance is a UK motorcycle and ATV parts specialist. We help riders find parts with clear specifications, vehicle fitment information where available and support before ordering.

Need help choosing the right part?

Contact us with your bike make, model and year, plus the part number shown above, and we can help you check compatibility.

• Call: 07765 534854
• Email: fdy@fdyperformance.com
• Website: www.fdyperformance.com