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The frictionless motocross and motorcycle ZR Throttle tube difference.
ZR Throttle tubes will give you that “freshy” new bike feeling – forever. Unlike traditional plastic throttle tubes, the weight of the rider either pushing or pulling on the throttle will create “friction”. Over time the throttle and handlebars deteriorate and need replacement. With ZR Throttle bearings, the friction is eliminated, making your no-stick throttle assembly ultra-smooth and tough. The ZR Throttle is virtually a maintenance free throttle tube – and it’s made in the USA.