2Bros Parts

PISTON KIT 96-09 TTR250 73.50, FORGED WOSSNER 8646D050

£182.40Only 1 left

4.1 Trustpilot 99.9% positive on eBay

Free UK delivery 2–4 business days

Spread the cost with Klarna 18+, T&Cs apply

1

Wossner forged piston kit for Yamaha TTR 250 models from 1996-2009. This 73.50mm bore piston features superior strength and design, engineered for optimal combustion chamber heat transfer. It has an elliptical design for uniform bearing surface under heat expansion, distributing thrust loads evenly and preventing piston collapse. Includes lock P/N CW18, pin P/N WP031, and ring set P/N 735XDS. Specifications include 59.60mm hub stroke, 0.05mm clearance, OEM compression ratio of 10.20:1, +1.40 cm3 dome volume, and 23.60mm compression height. Made in Germany.

Specifications
SKU
56-W198+050.WO
Brand
Wossner
Availability
In Stock (1)
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
73.5mm
Variant Id
254954
Delivery2–4 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Wossner Forged Piston Kit - 73.50mm Bore

Elevate your motorcycle's performance with this Wossner forged piston kit, engineered for superior strength and heat transfer. Designed to optimize combustion chamber efficiency, these pistons feature an elliptical profile that ensures uniform bearing surfaces under heat expansion. This innovative design prevents localized pressure, distributes thrust loads evenly, and effectively eliminates piston collapse for enhanced durability and longevity. Proudly made in Germany, Wossner pistons represent cutting-edge engineering for demanding riders.

Key Features:

  • Forged construction for exceptional strength and durability.
  • Elliptically designed for uniform bearing surfaces and even thrust load distribution.
  • Optimized for efficient combustion chamber heat transfer.
  • Prevents piston collapse and localized pressure.
  • Includes necessary components for installation.
  • Lock Part Number: CW18
  • Pin Part Number: WP031
  • Ring Set Part Number: 735XDS

Specifications:

  • Bore Diameter: 73.50mm
  • Clearance: 0.05mm
  • Compression Height: 23.60mm
  • Dome Volume: +1.40 cm3
  • Wossner Compression Ratio: OEM
  • OEM Compression Ratio: 10.20:1
  • Stroke: 59.60mm
  • Theoretical Weight: (Weight data not specified)
Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.

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

UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. 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.

More answers in our FAQ.

Trade pricing available

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

Apply for Trade
1