Cylinder Piston Top End Kit 180cc 4 Stroke GY6-180 ATVs, GoKarts, Scooters TYPE 1 BOLT PATTERN B=61 H=69 NOTE:Cyl Skirt OD=65 May require opening crankcase, check before ordering. : Get 2 It Parts, LLC offers SAME DAY SHIPPING. FAIR PRICING. SOUTH CAROLINA WAREHOUSING.