Select Your Ride

1
2
3

Wossner Piston Kit Yamaha YZ250 1988-1991 68.44mm 8134D050

Part Number: 09105547
WOSSNER
(No reviews yet) Write a Review
SKU:
09105547
MPN:
8134D050
Condition:
New
Availability:
Ships Same Business Day
Weight:
0.75 LBS
$152.00

Ships from Manufacture | Call to Order (231) 767-5055

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

A worn or damaged piston directly undermines your YZ250's power delivery, throttle response, and engine longevity. This Wossner kit restores—or significantly upgrades—your 2-stroke's performance with precision-engineered internals that handle sustained high-RPM abuse. Whether you're rebuilding after a failure or prepping for race season, a quality piston kit is non-negotiable for reliable power.

The Wossner 8134D050 delivers measurable advantages over OEM replacements. The proprietary skirt coating reduces friction and piston rock, translating to smoother operation, less noise, and improved ring seal. Built from 4032 T6 forged aluminum and validated through finite element analysis, this kit is engineered to withstand the demanding conditions 2-stroke racers impose on their engines.

This is a complete, bolt-on rebuild kit—no additional machine work required. Simply remove your top end, install the piston, rings, pin, and clips, and you're ready to ride.

  • Fitment: Yamaha YZ250 (1988–1991)
  • Bore diameter: 68.44mm
  • Material: 4032 T6 forged aluminum
  • Complete kit included: Yes
  • Skirt coating: Permanent friction-reducing
  • Heat treatment: T6 (high-load rated)
  • Design method: Finite element analysis
  • Origin: German engineering
  • Installation: Bolt-on, top-end rebuild
  • MPN: 8134D050
View AllClose

Specs

DISPLACEMENT:
246 CC
MODEL:
STANDARD SERIES
PRODUCT NAME:
PISTON KIT
TYPE:
DUAL RING
PISTON MATERIAL:
ALUMINUM ALLOY
PISTON MATERIAL:
FORGED
PISTON SIZE METRIC:
68.44 MM
BORE - OVERSIZE METRIC:
+0.50 MM
BORE SIZE METRIC:
68.50 MM
BORE - OVERSIZE:
+0,50 MM
ENGINE TYPE:
2-STROKE
RIDING STYLE:
OFF-ROAD
UNITS:
KIT
View AllClose

0 Reviews

View AllClose

Fitment

Fitment for Wossner Piston Kit Yamaha YZ250 1988-1991 68.44mm 8134D050

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