[Steen Carstensen]

Way too many variables to answer that question. Go to the track where you will be racing and ask around, that will get you in the ball park. Racers are normally very good at helping out newcomers.

[Jack Cook]

I’m Sorry I did not make myself clear. Not asking for a gear ratio for a track.

I am asking sprockets to have on hand. Rotax make drivers 11 to 16 do I need them all ? And the rear start at ? and go to ? like 70 tooth to 85 tooth ? that’s 15 rears do I need them all?

[Steen Carstensen]

12 and 13 are the most common drive sprockets, and 84-87 are normal rear sprockets. Again it very much depends on the layout of the track, how slow is the slowest corner, and how long/fast is the longest straight.

[Chris McGinley]

Jack,

This really does depend on what track and also which class of Rotax you’re running. You’ll probably use a 12t drive gear almost everywhere, but I keep 11t and 13t on-hand for some track configurations. For sprocket, you may see people on any size from 68-88 … all depends on the track, class, and driver.

If you’re just starting out, I’d recommend seeing what others are running at the track you plan to run at – otherwise you’ll spend hundreds of dollars on sprockets that you’ll never use.

-Chris

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