Originally Posted by dreaux

with a re10 pipe and a 8 or 9mm restrictor it would be really hard to do better power and speed wise for a stock motor. Both my ninja spec and jx are flat out retarded (ninja spec is in the shop right now) Put the 7mm insert and a re11 and the bottom is unreal. i have yet to see a stock motor with better performance.

not saying there isn't one. Orion, grp, rb, werks, p5 or plus 4 will not pull a ninja. I have yet to see a fms, torro, jpx, alpha or any of the js racing though. and from what i understand those are killer motors. the crank pin on my ninja has at least 6 gallons with no signs of wear. Bearings rod and pinch and it's new again. I just think its funny that when people consider top motors most of the time they fail to mention the jx. it is without a doubt one of the best on the market