28” Aggressive Mud Tire/Mud use and all 29.5” and larger tires only. This kit is also applicable for 26-28” aftermarket tires at high elevation (above 4000 ft). The BF 750 model has a different engine configuration than previous model years. This kit helps recalibration the shift pattern for best performance in mud, as well as the very large / heavy tire sizes. This kit includes Dalton’s Quick Adjust cam arms that make the kit easy to adjust for different conditions. Although it is well known that heavy mud tires hurt performance, this clutch kit can help bring your ATV back to life. There are also settings included in this kit for the use of 26-28” tires for deep sand and high elevation. The “set up guide” for different tires/conditions is included in the instructions. One adjustable kit that covers a lot of different applications!