New to Powersport Superstore? Try our Year-Make-Model search and find the right parts for your ride by clicking "My Garage" on the upper-right! ➡

Wsm 010-810-04K Piston Kit (639cc) - 0.25mm Oversize to 76.25mm Bore

SKU: 4568863

Wsm 010-810-04K Piston Kit (639cc) - 0.25mm Oversize to 76.25mm Bore

WSM
$76.94
$76.94 $82.17
Sale Sold out
/
Shipping calculated at checkout.
In stock and ready for shipping
This is a pre order item. We will ship it when it comes in stock.
Bore: 76.25mm
Sizing: 0.25mm Oversize

Competitively priced forged pistons. Coated with MOS2 for high performance and heat absorption. Ported to match WSM Banshee sleeves. Four piston categories from standard, big bore, 5mm long rod and big bore with 5mm long rod. Piston pin is 5mm higher on long rod pistons to accommodate long rod. Made in Germany.

Vehicle Fitment:

1991-1996 Kawasaki JF650 TS
1987-1995 Kawasaki JF650 X2
1991-1995 Kawasaki JL650 SC
1987-1991 Kawasaki JS300 300SX
1988-1993 Kawasaki JS650 650SX
Secure, Trusted, and Encrypted

Protected by industry-leading 256-bit SSL encryption and backed by Shopify’s PCI DSS–compliant infrastructure. Every page, click, and transaction is encrypted and monitored for threats — so you can shop with confidence knowing your data stays protected.

Parts for Every Machine

We stock aftermarket parts, gear and accessories for motorcycles, ATVs, UTVs, snowmobiles, personal watercraft, and even performance cars — all backed by expert support and live inventory.

Real-Time Fitment Accuracy

Search by Year, Make, and Model with confidence. Our proprietary vehicle fitment system ensures you’re only shown what fits — no guesswork, no returns — just parts that fit.

Fast, Trackable Shipping

We ship from over 20 U.S. warehouses — often same or next business day. Every order includes tracking and transparent fulfillment updates from start to finish, all processed through a secure, encrypted checkout.

Quick Links

Ride With Us. Stay Connected.

Follow us for real-time fitment updates, gear drops, and pro tips from the garage. No spam, just parts, tech, and news for riders like you.

Your Garage

Add a Vehicle