34mm Big-Bore kit from Zenoah for the G23LH / G230RC / CY23RC engines.

Also works as a replacement top end for the G260RC / CY26RC engines.

Increases displacement to 25.4cc. Includes 4 transfer port cylinder, piston w/ring, Champion RZ7C spark plug, piston pin, cylinder gasket, and clips.

Increases engine power SUBSTANTIALLY!

This high-performance product requires 91 octane (R+M/2 octane rating) or higher fuel, and comes without warranty.

Interchangeable with HPI part #15485.

Note: if installing this product onto a Chung Yang engine (CY23RC, CY26RC, etc), you will need to use a Zenoah pin bearing (5500-41410) and Zenoah pin washers (1101-41340).

Suits: Baja 5B/5T/5SC