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Wiseco K431A3 Forged Piston Kit Top End Rebuild

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

K431A3
7 reviews
Sale Price

$1,484.60

Estimated ship date Wednesday, November 18

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Fitment guaranteed

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Product Details

The Wiseco K431A3 is a high-performance forged piston kit engineered for demanding two-stroke powersports applications. Wiseco's forged pistons are manufactured using aerospace-grade aluminum alloy and a proprietary forging process that produces a stronger, lighter component compared to cast alternatives — delivering improved reliability under high heat and stress conditions.

Key Features:

  • Forged aluminum construction for superior strength-to-weight ratio over cast pistons
  • Complete kit includes forged piston, ring(s), wrist pin, and circlips for a full top-end rebuild
  • ArmorGlide skirt coating reduces friction and improves break-in performance
  • Precision CNC machining ensures tight tolerances for optimal ring seal and power output
  • Oversize bore designation makes this ideal for engine rebuilds where the cylinder has been bored out
  • Manufactured to meet or exceed OEM specifications for fit and performance

Wiseco has been a trusted name in performance pistons since 1941, supplying OEM and aftermarket piston solutions for motocross, ATV, snowmobile, and personal watercraft engines. The K431A3 kit simplifies top-end rebuilds by providing all necessary components in a single package.

Products specifications

Bore (in)

4.030 in.

Bore (mm)

102.362mm

Compression Distance (in)

1.550 in.

Notes

Reverse dome design with Slipper type skirt design.

Pin Diameter (in)

0.927 in.

Piston Head Volume (cc)

+15.00cc

Piston Material

Forged aluminum

Piston Ring Thickness

1/16 in. x 1/16 in. x 3/16 in.

Piston Style

Dish, with two valve reliefs

Quantity

Sold as a set of 8.

Wrist Pin Style

Press-fit or floating

Autoplicity has great prices and customer service. Shipping is fairly fast too. Ordered product on Monday and it was shipped on Wednesday. Will make future purchases with this company.

Very pleased with the service and quick shipping. Checked out through Amazon payments without any issues. Item ordred was the Hella Supertone Horns. Arrived in original box and packaging. Will not hesitate to order from Autoplicity in the future.

Another order for a toolbox! Great service swheet price!

Great prices very fast shipping!!!

Autoplicity had the lowest price online for the product I needed. I will definitely buy from them again.

A very good price on items. Very quick response and delivery. Thanks

Simple and easy, more companies should work this way.

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