Better belt grip and improved performance for oversized tires.
This kit is primarily developed to recover power losses and belt performance when using oversized tires, and to improve the durability of the drive clutch. There is significant improvement in acceleration and response compared to stock clutching when oversized tires are used.
There are some acceleration gains with stock tires, but not as significant. It does, however, hold proper RPM much better for soft terrain, sand, and hills, and offers much improved quality of components as well as adjustability for future tires or mods.
Oversized tires hurt performance. Larger diameter and heavier rotating weight. Proper clutching can re-calibrate the “rate of shift of the belt” to improve RPM and response. It also improves the clutch systems ability to backshift the belt quicker when the vehicle senses load, which is critical to life of the belt and other driveline components such as stress on the wet clutch. The KRX has very low final drive gearing compared to some other similar models, and in fact when clutching is set up properly it performs very well with larger tires.
The kit also improves durability of the primary drive clutch and components, no matter what tires you run. Our test unit showed some durability issues very early with stock components in the primary clutch.
Includes a better, more durable flyweight design, that is also adjustable to allow for correct “rate of shift of the belt” for different tire sizes and situations. The weights feature Dalton’s popular “Quick Adjust” threaded passage, that allows you to add or subtract mass from the flyweights without even removing the flyweights from the clutch. A nice feature if you use two different tire sizes or situations. The flyweights are designed and machined to work with a custom thrust washer (wear resistant surface) on each side of the flyweight. This method has been well proven in some of our other desert racing applications to reduce wear on drive clutch components, and provide consistent fluid motion of the flyweight.
Quick, easy adjustment is especially beneficial if you are switching between different tire sizes for seasons. Also helps with occasional trips to elevation ( although we are currently working on a separate kit more specific to high elevations).
There are also new springs for both the primary and secondary clutch, and the whole system is designed and calibrated to work together. The instruction manual gives a explanation of clutch components, and the included “set up guide” tells you how to set up the flyweights for the different tire sizes.
The kit is easily adjusted and can be used with other mods. There are also notes in the Set up guide with regards to modified ECU tunes and their effect/set up.