Big Bore Cylinder Barrel Kit: Aprilia RX50 RX 50 (2006-2018) Honda CB125 To replace OEM: 21121-1166 and

To replace OEM: 21121-1166 and 21121-1167

They will replace the following OEM numbers: 16065-1132

Malaguti F12 Phantom (1995-2008)

If you're having spark issues (weak spark or no spark) with your Honda GL500

Big Bore Cylinder Barrel Kit: Aprilia RX50 RX 50 (2006-2018) Honda CB125 To replace OEM: 21121-1166 andBrand new big bore cylinder barrel kit to fit: Aprilia RX 50 (2006 2018). This cylinder kit has been manufactured to upgrade the original top end on an Aprilia RX50 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: ZD4PVA ZD4PVH01 ZD4PVG01 ZD4PVL01 ZD4PVM01 ZD4PVSWA ZD4KKA0 ZD4KKA01.