I don't know if this is the best advice for non timing, but I raced the non timing class at west coast this weekend. The only way I got my duo3 motor to work well was to keep adding teeth. By the time racing came I ended up jumping from a 35 to a 39( it was the only one I could find over a 35). Temps on the motor after 15 minutes were 155-160 and my tekin rs was about 140. Hit about 25-27 mph on the straight and felt really good on the in field as well. Running three clicks of timing and the 12.5mm high torque rigor. I want to try a 38 or 37, but those are hard to find.