I am running a 583 with what I call mild porting. 38 mm carbs bored to 39.5mm with KickAss filters and stock exhaust. 2 questions - The motor is any older style 583. I don't believe the newer white faced RPM guage will work and I hate the small one- Has anyone tried this clutch set up 230/410 spring 17.5 grams with 286 ramps. The motor is in a s-2000 chassis.

What helix are you going to use? I thing you may have to much of a spring there, testing will tell.

I was going to try a straight 50 cam.