GEAR UP ELECTRIC MOTOR SPEED CONTROLLERS FOR FOOT THROTTLE, TWIST THROTTLE, THUMB THROTTLE, HANDLE BAR THROTTLE. REVERSIBLE FOR MOST MOTOR TYPES THAT USE PERMANENT MAGNETS.

World's Best Wind Turbine

DO NOT EVER LUG ELECTRIC MOTORS!
Motors used for boat propellers are much more forgiving than motors used for Karts which are firmly rooted to the ground.
Most vehicles require compound gearing and one or two jack-shafts to compound the torque of the motor.
GROUND VEHICLES MUST BE GEARED DOWN AND GIVEN ENOUGH TORQUE TO STAY COOL, REV HIGH AND DO THEIR JOB WITHOUT BEING LUGGED DOWN WHICH MAY BURN OUT THE MOTOR AND THE CONTROLLER.
BELOW ARE EXAMPLES OF MOTORS PROPERLY GEARED FOR THEIR JOBS BOTH SINGLE AND DOUBLE AND TRIPLE SHAFTS. DO NOT FORGET TO USE #4 AWG WIRE AND A 35 AMP FUSE AS EXTRA SAFETY FOR THE CONTROLLER.

SEE- https://youtu.be/UA4zBN9b_WI

THE RIGHT AND WRONG WAY

THE WRONG WAY! NOT ENOUGH GEARING!

This mining kart failed with only a 1:1 gearing ratio.

The owners where told to install a two stage double gearing shaft to make this

little track-crawler work properly with the high torque compound gearing brings.

THE RIGHT WAY! GEARED FOR HIGH TORQUE!

Now this Kart has great pulling power and the motor and controller

stay cool. This battary last for 25 miles and showed no sign of stopping.

SEE- https://youtu.be/UA4zBN9b_WI

SINGLE-GEARED-SHAFTS for light weight jobs like small Karts and Bikes on flat ground

DUAL-GEAR-SHAFTS for extra torque and tough jobs like larger Karts and Bikes that need to climb hills.

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TRIPLE-GEAR-SHAFTS - For Karts and Bikes that need to carry extra very heavy loads

Cross Ref: Info on gearing water wheels and wind turbines LINK HERE

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