Lamar County Speedway Starting Gear Ratios

Starting gear ratios for standard (counterclockwise) direction.

Reverse direction typically requires 1-2 more teeth on the rear.

Ratios noted with “spec” are fixed gear classes where ratio may not be changed.

Class#35 Gearing#219 Gearing
LO206 Kid Kart17/57 specN/A
LO206 Sportsman15/60 - 6.00 rear
16/60 - 4.60 rear
18/71 - 6.00 rear
19/72 - 4.60 rear
LO206 JuniorTBATBA
LO206 Senior15/59 16/6219/74
Comer Kid KartN/A10/89 spec
Yamaha SportsmanN/A11/81
IAME Mini SwiftN/A10/83
IAME Pro SwiftN/A10/84
Yamaha JuniorN/A10/81
Yamaha Senior SR-YN/A10/84
TaG JuniorN/A10/84 - varies
TaG SeniorN/A10/84 - varies
TaG HeavyN/A10/84+ - varies
125 ShifterN/A#428 - 14/25 - 14/26