my buddy just finisned his suki and its a rocket.
H.C. piston, ported head and some custom cams and its a rocket..
The fuel inj. has had no problem with all the extra mods and air.
Thats just it. They dont make more power.
A bolt on yfz(meaning pipe,intake,jet kit and cam mod) makes more power.
And yfz is lighter. For shooting comp hill the yfz is just faster.