Welcome to Powersport Superstore. Since 2007 your first choice for Motorcycle, ATV, UTV, Jeep, Truck, Snowmobile and Personal Watercraft Parts, Accessories, and Apparel.

Sign up to be an Insider. As a member, you’ll unlock cash rewards, early access to new product drops, industry news, exclusive content, and special offers reserved for our inner circle. No public promos. No spam. Just perks for the people who live and breathe the ride. *Some restrictions apply.

Kibblewhite 80-81900 Top End Service Kit

SKU: 5908430

Kibblewhite 80-81900 Top End Service Kit

Kibblewhite Precision
$641.75
$641.75 $736.95
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.
The piston, rings, valves and pin clips in this kit are designed to work together as a system. They are NOT COMPATIBLE with O.E.M. components and should ONLY be used with the components in this KPMI Top End Service Kit..

These kits give your bike a performance boost. Kits include all necessary parts for a complete top end service/ rebuild: pistons, piston rings, piston pins, gaskets, valves and valve springs. Pistons fully machined from 2618 aluminum alloy with a performance skirt coating. Black Diamond or White Diamond engine valves (depending on application). Lightweight racing valve springs kit with titanium valve spring retainers, dual springs and H.T. steel base washers (springs are suitable for use with high-performance cams). All necessary gaskets, seals and O-rings included. Sold as a complete kit.

Vehicle Fitment:

2003-2006 Yamaha WR450F
2003-2005 Yamaha YZ450F
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