2Bros Parts

PISTON KIT 09-20 SX50 39.5mm A, WOSSNER 8262DA KTM MX 45230015000

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Wossner forged piston kit with a 39.50mm bore and 39.46mm actual bore. Designed for 50 cm³ engines with a 40.00mm stroke and 0.04mm clearance. Features include forged construction for superior strength, advanced engineering for optimal thermal transfer, and an elliptical profile for even pressure distribution, reducing piston collapse risk. Made in Germany. Specifications: Compression Ratio 2-stroke (Wossner and OEM), Compression Height 21.60mm, Lock Part Number CW12, Pin Part Number WP101, Ring Set Part Number RSB2950, Rod Part Number P2053. Cross-reference OEM Part Numbers: 45230007000, 45230038000, 09104899, 874M03950, 45230015000.

Specifications
SKU
56-W802.A.WO
Brand
Wossner
Availability
In Stock (1)

Fitments (31)

MakeModelYear
GASGASMC 502021
GASGASMC 502022
GASGASMC 502023
GASGASMC 502024
GASGASMC 502025
HUSQVARNATC 502017
HUSQVARNATC 502018
HUSQVARNATC 502019
HUSQVARNATC 502020
HUSQVARNATC 502021
HUSQVARNATC 502022
HUSQVARNATC 502023
HUSQVARNATC 502024
HUSQVARNATC 502025
KTM50 SX2009
KTM50 SX2010
KTM50 SX2011
KTM50 SX2012
KTM50 SX2013
KTM50 SX2014
KTM50 SX2015
KTM50 SX2016
KTM50 SX2017
KTM50 SX2018
KTM50 SX2019
KTM50 SX2020
KTM50 SX2021
KTM50 SX2022
KTM50 SX2023
KTM50 SX2024
KTM50 SX2025
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
39.5mm
Variant Id
257809
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Wossner Forged Piston Kit 39.50mm

This Wossner forged piston kit is engineered for optimal performance and durability in small-displacement two-stroke engines. Manufactured in Germany, this standard size replacement piston features advanced construction for superior strength and efficient thermal management.

Key Features:

  • Forged Construction: Provides exceptional strength and resistance to high operational loads.
  • Enhanced Thermal Transfer: Designed to maximize heat dissipation from the combustion chamber to the cylinder walls, contributing to engine longevity.
  • Elliptical Piston Profile: Promotes even pressure distribution, effectively reducing the risk of piston collapse under stress.
  • Precision Manufacturing: Made in Germany, ensuring high quality and reliability.

Specifications:

  • Bore Size: 39.50mm
  • Actual Bore: 39.46mm
  • Engine Displacement: 50 cm³
  • Stroke: 40.00mm
  • Clearance: 0.04mm
  • Compression Ratio: 2-stroke (compatible with Wossner and OEM specifications)
  • Compression Height: 21.60mm
  • Lock Part Number: CW12
  • Pin Part Number: WP101
  • Ring Set Part Number: RSB2950
  • Rod Part Number: P2053
Before you buy

QUESTIONS? JUST ASK

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

Check the fitment table on this page against your make, model and year. Not sure? Call or email us 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

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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.

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