New from Chung Yang - the 45.7cc big-bore kit for the GP420 engine. 42mm bore, 33mm stroke (up from stock 40mm bore) increases displacement from 41.5cc to 45.7cc. This larger displacement increases engine power by more than 10%, without any loss of top-end RPMs!. Also works as a replacement top-end kit for the GP460 engine. Includes cylinder, piston, piston ring, and snap ring set.
FITS THE FOLLOWING:
- CY42
- G420RS
- GTR 46 Trail Ripper
- Super Go-Quad 46
- Super GSR46R
- Trail Ripper Quad
