Select Your Ride

1
2
3

WSM Piston Kit - Kawasaki 300 - +1 mm 50-255-07K

Part Number: 09103512
WSM
(No reviews yet) Write a Review
SKU:
09103512
UPC:
865369247011
MPN:
50-255-07K
Condition:
New
Availability:
Ships Same Business Day
Weight:
0.86 LBS
$103.55
Prop 65 Warning Prop 65 Warning cancer & reproductive harm Price Match Call for more info on price match does not include 3rd party ads

Description

If you're building serious displacement on your Kawasaki 300, piston quality directly determines how long your engine survives at high RPM. WSM's +1mm piston kit delivers OEM-equivalent construction with critical upgrades—a hardened crown for ring groove durability and a friction-reducing MOS2 coating that actively draws heat away from the piston. This isn't cosmetic improvement; it's measurable gains in reliability and power retention under sustained load.

The improved E-clip design eliminates a common failure point, while the specialized skirt coating reduces friction losses that rob you of horsepower. Order one kit per cylinder and pair with optional replacement rings for a complete refresh.

  • Kawasaki 300 specific
  • +1mm oversized bore
  • Piston, rings, pin, clips included
  • OEM-equivalent quality
  • Hardened crown design
  • MOS2 friction-reducing coating
  • Heat-drawing skirt technology
  • Improved E-clip design
  • Additional rings available separately
  • One kit per cylinder
  • MPN: 50-255-07K
View AllClose

Specs

BORE - OVERSIZE METRIC:
+1.00 MM
UNITS:
KIT
BORE - OVERSIZE:
+1,00 MM
PISTON MATERIAL:
ALUMINUM
BORE SIZE METRIC:
77.00 MM
MODEL:
ORIGINAL
PRODUCT NAME:
PISTON KIT
RIDING STYLE:
ATV
View AllClose

0 Reviews

View AllClose

Fitment

Fitment for WSM Piston Kit - Kawasaki 300 - +1 mm 50-255-07K

View AllClose

FREE Shipping on orders of $99 or more!


Commercial Accounts

We offer tax-free commercial accounts, providing businesses with significant savings and streamlined benefits.



Easy 30-Day Returns

We proudly offer 30-day easy returns, ensuring a hassle-free and convenient shopping experience for our customers.


You May Also Like

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

SECURE & SAFE PAYMENT

EASY RETURNS

FAST DELIVERY

AUTHORIZED DEALER