Seller notes

100cc (50mm BORE) UPGRADE KIT (#2) FOR QMB139 MOTORS TRUE DISPLACEMENT: *81.3cc WITH STOCK CRANK*PEOPLE REFER TO THIS KIT AS 100cc THIS KIT IS TO UPGRADE YOUR STOCK 50cc QMB139 MOTOR AND TURN IT INTO A 81.3 / 100cc MOTORADDING MORE POWER FOR BETTER PERFORMANCE KIT INCLUDES: CYLINDER BODY : 50mm CYLINDER HEAD (VALVES INSTALLED): NON EGR *69mm VALVES*TOP AND BOTTOM GASKETS, PISTON AND PISTON RINGS SETWRIST PIN, CIR CLIPS50mm INSIDE DIAMETERCYLINDER GASKET GY6 50cc CYLINDER BORE: 50mm CYLINDER HEAD...

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