Big Bore Cylinder Barrel Kit: Aprilia Sonic AC 50 (1998-2008) Honda NB50 Yamaha YBR 125 Carb (2005-2010)

Yamaha YBR 125 Carb (2005-2010)

Yamaha WR 450 F (2003-2014)

Honda CR 250 R (1981-1986)

This set of head stock bearings are taper roller style and have been manufactured to replace the original set of steering bearings on a VF750 for the years and models shown above

Kawasaki ZXR 250 R (ZX250 D1) (1991)

Big Bore Cylinder Barrel Kit: Aprilia Sonic AC 50 (1998-2008) Honda NB50 Yamaha YBR 125 Carb (2005-2010)Brand new big bore cylinder barrel kit to fit: Aprilia Sonic AC 50 (1998 2008). This cylinder kit is an upgrade on the original Aprilia Sonic AC 50 for the years and models shown above. The top end will go from 50cc to 70cc. This kit includes: cylinder (barrel jug) cylinder head piston kit gaskets To replace OEM cylinder: TBC Minarelli Horizontal 2T A C (Air Cooled) Engine.