My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Wiseco 549M07800 ProLite 2-Stroke Forged Piston Kit 78mm +2mm Oversize Kawasaki JS300/650

(1989-1996 Kawasaki JF650 TS; 1986-1995 Kawasaki JF650 X2; 1991-1995 Kawasaki JL650 SC; 1986-1988 Kawasaki JS300; 1987-1991 Kawasaki JS300 300SX + 1 more model)

Part of: Wiseco Pistons ProLite Piston Kit Yamaha

Other options in this family: Wiseco Pistons 899M05400 Wiseco Pistons PK1502 Wiseco Pistons PK1521 Wiseco Pistons PK1567 Wiseco Pistons PK1504

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

549M07800
8 reviews
Sale Price

$179.99

Estimated ship date Sunday, November 22

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Wiseco 549M07800 is a ProLite forged 2-stroke piston kit designed for the Kawasaki JS300 and JS650 personal watercraft. Featuring a 78.00mm bore diameter (+2.00mm oversize) with Wiseco part reference 3071TD, this kit delivers the strength and precision demanded by both performance riders and weekend enthusiasts rebuilding their watercraft engine.

Key Features:

  • Forged High-Silicon Aluminum Construction: Forged from high-silicon, low-expansion aluminum alloy for superior tensile strength, reduced weight, improved heat transfer, and extended service life compared to cast alternatives.
  • ProLite Design: CNC-machined for an optimized cam shape and piston skirt profile, delivering maximum horsepower and service life in 2-stroke applications.
  • Precision Diamond-Turned Finish: Machined on CNC turning centers for a perfect finish with no size variation, ensuring a consistent, reliable fit in the cylinder bore.
  • Universal Cylinder Compatibility: Suitable for use in cast iron, chrome, Nikasil, and boron composite cylinder bore compositions.
  • Oversize Fitment: At +2.00mm over stock (78.00mm), this piston is ideal for worn cylinders that have been bored or sleeved to accept oversize pistons.
  • Complete Kit: Includes one piston, piston rings, wrist pin, and piston pin circlips — everything needed for a single-cylinder rebuild.
  • Made in the USA: Manufactured at Wiseco's state-of-the-art forging facility dedicated to powersports performance.

Wiseco is the only aftermarket piston manufacturer in the United States to produce pistons exclusively through the forging process, making the 549M07800 a trusted choice for Kawasaki JS300 and JS650 engine rebuilds. Reference number: 3071TD.

Products specifications

Fits

1989-1996 Kawasaki JF650 TS; 1986-1995 Kawasaki JF650 X2; 1991-1995 Kawasaki JL650 SC; 1986-1988 Kawasaki JS300; 1987-1991 Kawasaki JS300 300SX; 1987-1993 Kawasaki JS650 650SX

It was easy and quick to shop on your website.

great price, received item and latch was broke. I just contacted my sales rep to se if I can get a replacement latch WITHOUT having to box up and ship back entire order

So far so good

This copany shipped my order promptly. I would do business with them again.

pretty easy to order

Thank you.

great

My first order did not include all parts. I'm ordering a different part number now. The seller is giving me a discount due to this inconvenience. We will see how it goes.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy