Big Bore Cylinder Barrel Kit: Derbi GP1 50 (2001-2010) Honda TRX420 Pitch / Width / Links

Pitch / Width / Links  420-128 Colour Gold Seal Type No Seal Master Link Type Clip

To replace OEM Top: 53211-KRM-860

These RGV250 headstock bearings are taper roller style bearings

Nuts - 95707-06500

Big Bore Cylinder Barrel Kit: Derbi GP1 50 (2001-2010) Honda TRX420 Pitch / Width / LinksBrand new big bore cylinder barrel kit to fit: Derbi GP1 50 (2001 2003). Derbi GP1 50 Euro 2 (2005). Derbi GP1 50 Race (2005 2007). Derbi GP1 50 Open (2006 2010). This cylinder kit is an upgrade on the original Derbi GP1 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 Piaggio NRG Purejet 2T L C (Liquid Cooled) Engine.