With the 10T front I stayed around the same gearing from our “Clubman Spec” Yamaha KT.
Two schools of thought here (AUS)-
- Keep your Low RPM in the right window and don’t worry so much about your Top RPM. So if you can, run a smaller rear sprocket.
- Get your RPM’s as high as possible. There are racers here getting their KA’s to over 16K RPM (something I can’t do)
In the past, I have been tuning for 15+K top RPM- which has been working, but have changed to trying to keep my low RPM to 7-8K which at my track at works out to ~14.5K Hi RPM. I do have to watch my technique more, but the plus is, i am not being left behind on the straights.
I wont claim to have made up massive amounts of time. But it did prove to me that there is more than one way to set up a kart to get best times. And I think not reving the engine so hard must be good for engine life, but time will tell on that.