Big Bore Cylinder Barrel Kit: Vespa S 50 (2007-2010) Honda CR500 The models are (ZR400) A1

The models are (ZR400) A1 & B1

Kawasaki GPZ 500 S (EX500 E) (1994-2003)

They will replace top bearing 92116-1076 and bottom bearing 92116-1069 on a KLX450R / KLX 450 R

To replace OEM: 30510-GY1-900

Yamaha FZR 400 RR SP (EXUP) (1990) & (1992) & (1994)

Big Bore Cylinder Barrel Kit: Vespa S 50 (2007-2010) Honda CR500 The models are (ZR400) A1Brand new big bore cylinder barrel kit to fit: Vespa S 50 (2007 2010). This cylinder kit has been manufactured to upgrade the original top end on a Vespa S50 to 70cc for the years and models shown above. The kit includes the cylinder barrel jug, head, piston kit and gaskets. To upgrade from 50cc to 70cc.