RK Tek Head on 2010 800 Dragon Clean fire

[Dock]

I'm wondering if anyone has run RK Tek drop in Kit on the Dragon and how did it work? I'm researching this for a friend of mine, they state on their website that they didn't test it on this sled but it should work. Any input would be helpful.
Thanks

 

[PaulAnd]

Have about 800 miles on my Rktek top end, 2010 assault, still runs awesome and its about dead even with my XM

 

[Mitch Hartley]

I installed mine before the engine blew up because i was having some ride-ability issues, sluggish, poor response etc. Best thing ever. Piston slap is gone, runs about 15 to 20 degrees cooler, more and better response on the low end of R's. Seems to use less fuel and the FUN factor has been increased greatly. The only problem I have is it wanted to load up on fuel and foul out when you dog it through the trees at low RPM. I installed a hotter plug and runs like a champ now. It likes to be run hard and seems to enjoy doing it.