you really need to know what you have before ordering parts. check the number plate. it's on the right side of the case,as your facing the valve cover, stamped on a flat area below the cvt cover, beside the oil drain plug. anyone you talk to will want this numberin order to be sure your both on the same page.
For example: 157qmj { engine code for a 150}
(Digit #1) Corrosponds to the number of cylinders. All GY6 engines are single cylinder, so this number will always be 1.
(Digit #2 and #3) This is the bore size in metric millimeters, in the case of the 157QMJ,the bore is 57mm.
(Digit #4) relates to the style of engine. All GY6 engines are designated "Q".
(Digit #5 and #6) The actual size of the engine. The second letter ascends consecutively for each 10cc. MB = 50cc, MC = 60cc, MD for a 70, MH = 110cc, MI = 125cc, MJ = 150cc
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