04-05 TRX450R 97mm 479cc Big Bore Kit – Cylinder, CP Piston, Gaskets – Athena / CP Carrillo

Want more displacement for your 2004-2005 Honda TRX450R?

This big bore kit takes it from stock to 479cc with a 97mm cylinder and piston.

It's a complete top-end rebuild kit from a collaboration of brands: CP Carrillo piston, Athena cylinder, and AZ Quad Parts bits.

It includes the cylinder barrel, piston, piston rings, wrist pin, and a gasket set.

So basically everything you need to bump up the power.

The kit is made in the USA, performance-oriented, and comes with a 1-year warranty.

OEM part numbers 12101-HP1-670 and 13101-HP1-670 are superseded by this.

It's corrosion-resistant and sealed for durability.

If you're rebuilding your 450R and want more grunt, this is the way.

California Prop 65 applies, but that's expected.