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

JE Pistons 300272 Kawasaki Ultra 300X 10.50:1 83.00mm Bore 4-Cylinder Forged Piston Kit

Manufacturer

Picture for manufacturer JE Pistons

Part Number

300272
14 reviews
Sale Price

$1,119.99

Estimated ship date Wednesday, November 11

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 JE Pistons 300272 is a premium forged piston kit engineered specifically for the Kawasaki Ultra 300X personal watercraft. Designed for the 1,498cc inline 4-cylinder supercharged marine engine, this kit delivers a 10.50:1 compression ratio with an 83.00mm bore across a complete 4-cylinder set — ideal for performance-minded PWC riders seeking enhanced power and reliability.

Key Features:

  • Forged 2618 aluminum construction — provides exceptional tensile strength for high-demand, high-heat marine performance applications
  • 83.00mm bore diameter with a 10.50:1 compression ratio for optimized power output
  • Complete 4-cylinder kit — includes all pistons needed for a full engine rebuild
  • Engineered, forged, and machined 100% in the USA for precise quality control
  • Designed to handle the heavy engine loads, excessive operational heat, and high cylinder pressures of supercharged marine engines
  • Compatible with the Kawasaki Ultra 300X supercharged PWC platform (2011–2013)

JE Pistons brings over 75 years of racing piston expertise to every powersports application. Each piston is purpose-designed for the specific engine and riding environment, combining long-term durability with race-proven performance. This kit is a direct upgrade or replacement solution for the demanding Kawasaki Ultra 300X powerplant.

Note: This product is not CARB compliant and is not legal for sale or use in California.

Thanks! You were the only one's with what I needed! This color paint was discontinued. I was excited to get it to complete my project! Also good communication and speedy shipping helped! Will do biz again.<br>Order Number: 33544<br>Todd

Had the product I needed at a price that couldn't be beat. The shipping was a little high, but not completely out of line, either, and it was still better than other companies who have even MORE ridiculous shipping rates. Will buy from them in the future if they have what I need.

I was very impressed by Autoplicity's customer service and excellent pricing on brand name products. Also, they provided lightning fast shipping even as the holiday weekend approached.<br>As much as I want to see everyone in this world to "live long and prosper," I was especially pleased to deal with a company that did not export their customer service to another country. <br>I look forward to doing business again with Autoplicity.

great prices

Free shipping and a great price.

It was pretty easy, id do it again

Easy to order. Ask me again after I receive item.

the product reviews all seem to be reviewed of autoplicity's service instead of the item being viewed. either way, the shocks ordered were the right ones w/ all the parts w/ it. autoplicity's item descriptions could be a little more clear and/or explicit

it was quick and easy

Ordered a Simpson helmet on Monday afternoon, received tracking on Monday evening and will have the product on Wednesday! Quick service! Also would like to mention that the price was the lowest of anywhere I looked up.

good

Good

So far my experience with autoplicity has Ben good I like that u can pay with amazon

groovy

Share icon
Return Policy
Returns are easy at Autoplicity

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