Gearing, help

[Eddie Pettengill]

I have a esr 310 using 15 / 36 gearing for ice racing. The port and exhaust is a trx9. I need to get this thing into a higher gear ratio. What is the best way to do it? Go bigger on the rear or smaller on the front? Is there a advantage to doing it one way over the other as they both are higher ratios? Let's just say, I want 3rd gear to spin the tires easier on bottom end.

[acecarlos]

Go smaller on the primary drive sproket (Front) and bigger on the Rear sprocket. One tooth up or dwon on the Front sprocket equals 3 teeth on the Rear (average). If running a 15-36, try a 15-39 or go down to a 14-36...experiment with equal gear ratios by runing different front and rea sprocket combinations only once you have exhausted all other tuning options...the difference is small, however; equal combinations of gear ratios will behave slightly different.

Carlos.