I have a 2003 zr 900 with a d and d 1010. It's a 136 in.with a Wahl's suspension. Jaws pipes,vforce 3's,40 mm carbs,79 gram weights,60/40 helix,10 tooth drivers and geared at 24/39. The problem I'm having is that I can't get it to 60 foot at all. 1.54,1.55. The track's not spinning and it launches nice and straight. It engages at 4000. I weigh 230 pds. Any help would be much appreciated.