Hoca 63mm 4-Stroke Replacment Big Bore Cylinder for the Honda Grom 125 Big Bore Kit. Takes your stock 52.4mm cylinder and upgrades you to 180cc with a 63mm cylinder!
Includes cylinder and oil fittings. For use with Hoca Brand Big Bore Kit, we cannot guarantee fitment with other brands.
***Does not include or come with tuning parts/additional fueling. It is highly recommended that you look into performance tuning options like the Power Commander V!