Before the VFORCE3...I was jetted 260 at 1042 above sea level on stock reed cages and stock reeds along with my slight performance mods in my signature. When My VFORCE was added my jetting stayed the same. My plugs look a chocolate brown. Thats how my plugs looked before the VFORCE3. I made sure to install a set of new stock manifolds to insure that there wasn't any weather cracking leaks. If your motors are bored or your running bigger carbs it might take a slight rejet, but IT'S ALL GOOD!!! Does everyone remember the surprize attack the powerband gives you when you hit the throttle? My Shees' powerband has a more tractable throttle response. The VFORCE3 took some of the guess out of when the powerband hits. I'm gonna hit the tracks and fields some more this weekend,...I'll keep you all updated on the rides.