GY6 180cc big bore kit
If you are looking for a really really nice big bore 180cc for your GY6, this is the ticket! This kit has 76mm stud spacing (GY6 A chinese engine- the most common, 54MM STUD SPACING))
IMPORTANT NOTE: your engine cases will need to be bored out. This is not a drop in kit. You will need this tool CLICK HERE. In order to bore the cases the crank shaft has to be removed. Definitely add a high volume oil pump to this set up CLICK HERE. There is another must, this cylinder head made for the 63mm kit CLICK HERE. Don't forget an oil cooler CLICK HERE And you might as well make it a 188cc by adding a 2.5mm stroller crank shaft CLICK HERE.
OOORRRR JUST MAKE LIFE EASY AND GET THIS KIT: