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Wiseco

Wiseco 2 Stroke Forged Series Piston Kit, 55.50 MM Bore

$189.95 $170.99 Save $18.96

SKU: W00C 432M05550

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Special Order
Ships in 4–6 weeks
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$100 Minimum Order
Non-Returnable Item
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Overview

It is forged from high silicon, low expansion aluminum, offering superior strength, reduced weight, and improved heat transfer for longer life. The piston features a diamond-turned finish from CNC-controlled turning centers, ensuring a perfect finish with no size variation.
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Part #: 432M05550

Classic Forged 2-stroke pistons are perfect for those looking to rebuild their 2-stroke engine with reliable, high-quality components. These pistons cover a wide range of Powersports rebuilds, including vintage motocross models, classic street bikes, and snowmobiles. The forged material improves tensile strength over cast pistons, ensuring refreshed performance on the track or the trail.

Features:

  • Engineered, forged, and machined in the USA in Mentor, OH
  • Designed and built for each specific 2-stroke powersports engine
  • Improved tensile strength of forged material optimizes strength and service life
  • Dedicated forgings and additional lightening operations allow for optimized strength-to-weight ratio
  • Includes high-quality piston ring(s), wrist pin(s), and circlips

Wiseco 2 Stroke Forged Series Piston Kit, 55.50 mm Bore

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Vehicle Symptoms
  • Engine knocking or pinging under load
  • Loss of low-end power on 2-stroke engine
  • Excessive smoke from exhaust during acceleration
  • Engine running rough at idle
  • High compression leading to pre-ignition symptoms
Relevant Conversations
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  • Wiseco forged piston set 432M05550 review
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  • replacing piston rings on 2-stroke dirt bike
  • symptoms of a bad piston on 2-stroke engine
  • 55.50mm forged piston for 2-stroke rebuild
  • Wiseco vs Vertex piston for YZ125
  • compression loss 2-stroke top end rebuild kit
  • how to install 2-stroke piston circlips
  • best forged piston for a 2-stroke snowmobile

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandWiseco
Part NumberW00C 432M05550

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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