RK TEK cylinder heads are the best built and best performing two stroke cylinder heads there are. Period. None of the other aftermarket or custom heads come close, no matter what they say on their YouTube videos about them. This is the only KTM head with a patented design, and the other guys wish they had a head that came close to the performance of the RK TEK heads.
We're so absolutely confident of this that RK TEK has the only 100% money-back guarantee in the business.
Developed, tested and perfected in the high altitude single track of Idaho, and 100% made in the USA.
These are the best heads for single track, woods, elevation, mountain riding and trail bikes there are. How do we know that? Because we've bought and tested all the heads from the other guys and measured them against ours, and they don't have the smoothness and power of ours across the entire band. We've had some that made a nice gain at a particular spot in the band, or had some impressive single area characteristics, but none of them had the full and complete power band improvement and gains that ours make through the entire throttle range.
We've been at this longer than anyone else, have put more work into what we're doing and have more loyal and satisfied riders than anyone else, so we're not just talking the talk.
When you have a narrow power-band (stock head) the higher gears are not very usable, because the engine will not supply the needed torque at the lower RPM. So you're forced to ride in the lower gears in order to maintain any torque. After the head install, the torque is produced at a much lower RPM than before. That allows for 1-2 gears higher in the slow and technical stuff, or on heavy loaded hill pulls. The higher gear running allows for faster overall speeds and less fatigue on the rider, because he doesn't have to work as hard to keep traction. Almost all riders find they are faster and in more control when running the higher gears, and confidence increases along with it.
The stock 250 and 300 head, especially 2014 and newer, is a very inefficient design and leaves a lot of performance on the table. We have developed a true performance enhancer with this custom billet head, designed specifically for mountains and single or dual track riding. It widens the engine's effective power-band considerably and allows for a much more linear power delivery. Cooling is also increased, and a cooler running engine will last longer and produce more power.
Porting packages are also available. That will wake up the engine even more.
DYNO CHART
Note: the dyno chart is from one of our customers.