2Bros Parts

PISTON KIT XT350 TT350 87.50, FORGED WOSSNER 8502D150

$232.55

4.1 Trustpilot 99.9% positive on eBay

Delivery to United States 5–8 business days

Out of Stock

Wossner 87.50mm Bore Piston Kit (Part No. 8502D150) is a high-performance forged piston. Engineered for strength and durability, it optimizes heat transfer within the combustion chamber and features an elliptical design to ensure even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance. Features include high-strength forged piston construction, optimized heat transfer for improved combustion efficiency, and elliptical design for even thrust load distribution. Specifications include 87.50mm bore size, 87.43mm actual bore diameter, OEM compression ratio (9.00:1), 346cc displacement, 59.60mm stroke, 0.07mm clearance, -2.80cm³ dome volume, and 22.20mm compression height. Cross-reference OEM part numbers include Lock P/N CW19, Pin P/N WP050, and Ring Set P/N 875XSY.

Specifications
SKU
56-W4674+15.W
Brand
Wossner
Availability
Out of Stock
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
87.5mm
Variant Id
255879
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Wossner 87.50mm Bore Forged Piston Kit

Enhance your Yamaha TT350 or XT350 engine with the Wossner 87.50mm Bore Piston Kit. This high-performance forged piston is engineered in Germany to deliver superior strength, durability, and optimized engine performance.

The elliptical design of this piston ensures even load distribution across its surface, reducing localized pressure and preventing piston collapse. It also features an optimized heat transfer design to improve combustion efficiency within the engine.

Key Features:

  • High-strength forged piston construction for maximum durability.
  • Elliptical design for even thrust load distribution, promoting consistent performance.
  • Optimized heat transfer for improved combustion efficiency.
  • Manufactured in Germany to exacting standards.
  • Maintains the Original Equipment Manufacturer (OEM) compression ratio for reliable engine operation.

Specifications:

  • Bore Size: 87.50mm
  • Actual Bore Diameter: 87.43mm
  • Compression Ratio: OEM
  • OEM Compression Ratio: 9.00:1
  • Displacement: 346cc
  • Stroke: 59.60mm
  • Clearance: 0.07mm
  • Dome Volume: -2.80cm³
  • Compression Height: 22.20mm
Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).

Call or email us with your make, model and year and we will check it for you before you order.

Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details

Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy

By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.

Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.

More answers in our FAQ.

Trade pricing available

Buying parts for your business? Apply for a 2BrosParts trade account.

Apply for Trade

Out of stock