A piston that fits loose burns oil and loses compression. One that fits tight seizes under heat. The WISECO 653M04200 is built for your 42.00 mm / Yamaha PW50 engine with the kind of precise dimensional control that sits exactly where it should — delivering clean combustion sealing and smooth cylinder wall contact from the first fire-up. Forged from high-silicon aluminum alloy for maximum strength and dependability. Wiseco offers a complete range of popular piston models and years for both trail and racing applications. Bore Size: 42.00 mm. Every serious rebuild deserves components engineered to this standard, and the 653M04200 delivers it.
Features
- Forged from high-silicon aluminum alloy for maximum strength and dependability
- Wiseco offers a complete range of popular piston models and years for both trail and racing applications
- Durability, longevity and increased horsepower
- Innovative forging design and piston skirt provide maximum horsepower and torque
- Features forged pistons, rings, wrist pins, and circlips
- These high-tech piston designs offer maximum compression ratios, ultra-stiff strutted forgings, and titanium nitride-coated rings, which all add up to more power that is sustained longer
- Each piston is E-Coated on the crown, ring grooves, and pin bore, for maximum wear resistance and protection from micro-welding, galling, and detonation
- GP Series parts generally have less machining on the outside, which helps seal up the bore for increased compression
- Additionally, boost ports are removed for a more predictable powerband and increased pull on the top end
- Cylinder sleeves must be purchased separately.
- Service intervals may be increased with Racer's Choice pistons over conventional Wiseco pistons, and are for expert racers and tuners only.
Specifications
- Bore Size: 42.00 mm
- Piston Material: 4032 Aluminum Alloy
- Model: Forged Series
- Piston Diameter: 41.96 mm
- Skirt Coating: Non-Coated
- Stroke Length: 39.20 mm
- Riding Style: Off-Road
- Stroke Length: 39,20 mm
- Bore - Oversize: +2.00 mm
- Engine Type: 2-Stroke
- Bore - Oversize: +2,00 mm
- Compression Ratio: Stock
- Displacement: 49 cc
- Piston Material: Forged
- Units: Kit
Frequently Asked Questions - WISECO - 653M04200 - Piston Kit - 42.00 mm - Yamaha PW50
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
