Hiya Bill,
My throttle (2 cables, running over the spar) have always worked ok once adjusted. Maybe it is too heavy to "snap" shut tho?? Much as I prefer this, I dont think mine does... Tho if your SRX does, I am certain the MZ can be made to do same. Incidently- 1 cable or 2 on your SRX? It was always one on mine, with no probs.
Does your tank sit right? Rubber at the front, bracket at the back?
I junked the airbox and put 2 conical filters on insted. Mostly aesthetic, to free up a bit of space where there was once black plastic! However, it runs much better (and now doesn't fill up with rainwater!). Dnojetted and Renegade pipe, there are pics about, so drop me a line for more info.
Cheers for now pal,
a