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cars:gears [2025/02/13 07:08] – Nedracars:gears [2025/02/13 07:09] (current) – [Historic guide] Nedra
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 As discussed in the Chain section, the ANSI #35 chain is the most commonly used size within the League. Sizing this type of sprocket to the typical context for Power racing includes a little bit of math. The [[https://www.bmikarts.com/Go-Kart-Gear-Ratio-Speed-Calculator |Calculator from BMI Karts is pretty useful for performing this math.]] Important data for using this calculator with a BOMA MY1020 motor: As discussed in the Chain section, the ANSI #35 chain is the most commonly used size within the League. Sizing this type of sprocket to the typical context for Power racing includes a little bit of math. The [[https://www.bmikarts.com/Go-Kart-Gear-Ratio-Speed-Calculator |Calculator from BMI Karts is pretty useful for performing this math.]] Important data for using this calculator with a BOMA MY1020 motor:
- * "Drive Wheel Diameter in Inches" should be actual/measured, not just nominal off the sticker, for the most accurate calculation. +  * "Drive Wheel Diameter in Inches" should be actual/measured, not just nominal off the sticker, for the most accurate calculation. 
- * The "Rated Engine RPM" the standard "silver can" BOMA MY1020 motor is 4700 RPM +  * The "Rated Engine RPM" the standard "silver can" BOMA MY1020 motor is 4700 RPM 
- * Adjust the Teeth on Axle value until you get a gear ratio/maximum RPM output that feels right. +  * Adjust the Teeth on Axle value until you get a gear ratio/maximum RPM output that feels right. 
- * For "Teeth on Clutch" the smallest #35 sprocket that typically fits on the BOMA MY1020 motor is a 9-tooth.+  * For "Teeth on Clutch" the smallest #35 sprocket that typically fits on the BOMA MY1020 motor is a 9-tooth.
  
 Aiming for 22/23 MPH on the calculator has proved acceptable for many middle-of-the-road karts. Aiming for 22/23 MPH on the calculator has proved acceptable for many middle-of-the-road karts.
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 ===== Historic guide ===== ===== Historic guide =====
  
-this historic guide is preserved for posterity.+This historic guide is preserved for posterity.
  
 Common gear/sprocket tooth profiles:   Common gear/sprocket tooth profiles: