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Engines and Components› Pistons and Piston Rings
Wiseco
Wiseco 2 Stroke Forged Series Piston Kit, 54.50 MM Bore
SKU: W00C 432M05450
Easy — 1–2 hours
Overview
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Part #: 432M05450
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, 54.50 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
- Loss of compression after top end rebuild
- Hard starting when engine is cold
- Low power and bogging at high RPM
- Excessive smoke from exhaust
- Piston slap noise at idle
Relevant Conversations
- Suzuki RM125 1978 piston kit replacement
- Wiseco forged piston vs cast for RM125
- How to install piston kit on RM125 1977
- RM125 top end rebuild parts list
- Symptoms of worn piston on 2-stroke
- Best piston for vintage Suzuki RM125
- RM125 low compression fix piston ring
- Wiseco 432M05450 review and install
- Where to buy Wiseco piston for RM125
- Co-purchase: gasket set for RM125 top end
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
| Brand | Wiseco |
| Part Number | W00C 432M05450 |
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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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