Brand new big bore cylinder / barrel kit to fit:
Aprilia RS 50 (2006-2010).
This cylinder kit has been manufactured to upgrade the original top end on an Aprilia RS50 to 70cc for the years and models shown above. The kit includes the cylinder / barrel / jug, head, piston kit and gaskets.
To upgrade D50B0 or D50B1 2 stroke engine from 50cc to 70cc.
Chassis prefix: ZD4PL / ZD4RG.