Head for the '23-NEWER KTM/HUSKY/GAS GAS TBI Engines! WILL greatly improve performance with ZERO drawbacks! NO FUEL CONTROLLER is REQUIRED!! Must if you live at altitude NOTE: For the TBI Models--->This is JUST a new insert that fits inside your OEM Head. Your STOCK head is an "Insert" design Make sure, you have a "TBI" bike. improve/widen the effective RPM Band GREATLY. TORQUE is increased at ALL RPM but our focus is, usually, directed to increase the lower and mid RPM torque. At no time will our heads give up top end performance or over-rev. We do NOT "Rob Peter to pay Paul" designed for 4000-10,000 ft. Elevation. Big improvement in the mountains but can still run in moab! The specific RK Tech (Patented) design keeps the compression ratio in check and allows for well functioning squish band. This ,GREATLY, improves torque output and reduces the onset of detonation. In short, your engine will perform like it should with a very SMOOTH and LINEAR torque delivery. Wheel spin is REDUCED so better traction is the result. Also you will be much less tired as a result of not having to use as much energy to "control" your bike. The smooth and linear power delivery takes this burden off of you. You will not find a better mod for your engine and yourself!