APRILIA counterbalance sprocket for APRILIA RS 125cc from 1999 to 2005 rotax motor

Here is the original gear APRILIA for APRILIA RS 125cc 2-stroke rotax motor from 1999 to 2005. This gear against the shaft but also called balancer pinion is composed of 27 teeth. This reference is 2 times on your engine. Once attached to the crankshaft outlet and the second to the balancer shaft. If one is worn we strongly advise you to change both to avoid premature wear.