Let’s not pretend the KRX drivetrain is bulletproof. If you’ve spent time pushing these machines, you already know there are weak links, and the output shaft is one of them.
This chromoly output stub shaft was built to solve that problem the right way. Not just stronger, but smarter. Designed with proper material, correct flex characteristics, and real-world testing behind it, this is built to be the last shaft you’ll need to buy.
We partnered with Branik Motorsports, the same guys behind race-proven axles and shafts in high-horsepower desert cars and rock buggies. The result is a shaft that’s stronger where it needs to be, but still allows controlled twist so you don’t just move the failure point deeper into your drivetrain.
Because the reality is, you need a weak link. The goal is making sure it’s not your transmission.
Key features
Made from 4340 chromoly steel
Designed to allow controlled twist under load
Larger diameter in critical stress areas
Heat-treated for improved strength and wear resistance
Increased diameter at bearing surface for tighter fit
Reduces shaft movement within the carrier bearing
Made in the USA
tips & Notes
Includes:
(1) 4340 chromoly output shaft
(1) Replacement OEM O-ring
Replaces OEM Part #: Kawasaki #13310-0046
Built to twist under load instead of snapping at splines
Designed to handle significantly more stress cycles than alternative materials like 300M
KRX drivetrains have multiple weak points: front input shaft, driveshaft tube, and output shaft/carrier bearing
Upgrading everything without leaving a weak link can lead to catastrophic failure deeper in the system (transmission damage)
Recommended Setup:
For aggressive riding or larger tires (35"+), consider upgrading:
Carrier bearing
Output shaft
Driveshaft
Maintain a manageable weak link (commonly the front input shaft) for easier trail-side repairs
Installation
Removal of driveline system is required for installation
Installation videos available for both standard and 2025+ 2-seat models
Not sure about a product? That’s exactly what we’re here for.
Whether you’re dialing in your build, comparing options, or just want a second opinion before you buy, reach out and talk to a real person who knows these machines.
