Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Engines and Components› Pistons and Piston Rings
Wiseco
Wiseco 2025 Kawasaki KX250 14.5:1 CR Piston Kit
SKU: W00C 40328M07800
Advanced — 4+ hours
Overview
Show original supplier description
Part #: 40328M07800
The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco's forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you're looking for.
Features:
- Engineered, forged, and machined in the USA in Mentor, OH
- Designed and built for each specific 4-stroke powersports engine
- Improved tensile strength of forged material optimizes strength and service life
- Dedicated forgings allow for optimized strength-to-weight ratio
- Includes high-quality piston rings, wrist pin(s), and circlips
Wiseco Kawasaki KX250 '25 14.5:1 CR
Vehicle Symptoms
- Loss of low-end power on acceleration
- Engine knocking or pinging under load
- Excessive oil consumption after high miles
- Loss of compression during leak-down test
- Need for top-end rebuild after racing season
Relevant Conversations
- Wiseco 14.5:1 piston kit for 2025 KX250
- High compression piston upgrade KX250X
- KX250 piston replacement after rebuild
- Wiseco vs OEM piston for 2025 KX250
- Best piston for KX250 motocross build
- 14.5:1 compression piston on 250F
- KX250X top end rebuild kit
- Wiseco 40328M07800 reviews
- 2025 KX250 piston ring gap specs
- Wiseco forged piston durability KX250
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Wiseco |
| Part Number | W00C 40328M07800 |
Videos
How To Measure Dirt Bike Piston To Cylinder Wall Clearance
How To: Piston ring install - 4 stroke dirt bike (kx250f)
Wiseco Piston Inc. - Proper Circlip Installation
KX 250 1999 Kawasaki Motocross Walk Around and Test Drive FMF Gnarly, Wiseco Forged Piston & Crank
KX 250 Back On The Trail With New Wiseco Pro-Lite Piston Kit
About MOTORMIA
Buy with Confidence
Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy