Home Forums 4-Cycle Racing Clone engine gearing

This topic contains 2 replies, has 3 voices, and was last updated by  Gary Lawson 1 year, 10 months ago.

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    Mark Lozon

    Question: Box stock clone jr, will the engine pull off the corners better with a 15 on the clutch or an 18 sprocket ? Some say the 15 allows the engine to build rpm’s faster ?????


    Steen Carstensen

    Yes it will build RPM (not rpm’s 🙂 ) faster with a smaller sprocket on the clutch. Do the math, 15 vs. 18 is a lower gearing.


    Gary Lawson

    Im sure you are speaking of a 15 v 18 with the same ratio ie 15/60 and 18/72. Oval racers will swear the 18 has better straight speed once you get wound up but the 15 accelerates better. Actual ratio is more important to me but I think the smaller combo does accelerate a little better

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