Mad Dog stearns deluxe thumb assist - $2.88

By extending your ATV throttle and providing multiple thumb positions, this handy assist provides more leverage and the ability to use the palm of your hand to apply the throttle. This virtually eliminates the chance of a tired or sore thumb after a long day of riding. It has a comfortable ergonomic shape and nonslip surface. Made of super-tough nylon core overlaid with soft rubber for added comfort. It fits all ATVs without modification to the existing throttle tab. Installs in minutes. - $2.88