A hard to find genuine and original Aprilia Rotax engine 123 cylinder barrel for the RS 125 and AF1 bikes, it has GILARDONI 1, 220D, ROTAX 223616 stamped on the intake sides of it. all threads are good, and the cylinder is in good condition with matching piston and rings also top end bearing and pin, only 1 circlip for the pin though, ready to fit to your bike Happy to answer any questions
eBay