03-19 KAWASAKI ZX636: Motion Pro Nylon Throttle Tube The Motion Pro Nylon Throttle Tube is a great alternative to your motorcycle's O.E.M. tube with outstanding quality and an affordable price.Constructed with a nylon fabric composite material that exceeds O.E.M.-type material for maximum durability.Will not scar handlebars due to the nylon construction.Pop-out end caps for use with bar-end-