Originally Posted by
adamym
Sorry, I'm up around 150 about 4 minutes into (17t pinion). The basic rule of thumb that I was told is if the motor is cool and the speedo is hot then gear up, and vice versa. So I tried all of the combinations all up to a 22 tooth pinion. I'm running a speed passion reventon pro as the speedo.
Ok your motor temp sounds fine. My next advice would be to check your motor temp after 8 or 10 minutes. Then again about 12-15 minutes. If you're staying under 160 all the time you should be good.
You also want to gear for what will put down your best lap times on the track, and obviously not having thermal issues. More speed isn't always necessary.