GY6 180cc Long Case Big Bore Kit

Sold out.

Made for the 150cc and 125cc 4-Stroke GY6 engines. Upgrade your stock engine with this complete kit. No boring necessary. Comes with 63mm piston and bored cylinder with left crankcase and right casing already bored out ready to install. 

• 63mm Piston
• 63mm Cylinder
• Right side crankcase
• Left side casing
• Rings
• Clips
• Pin
• Super HP 2-valve head
• Engine cover valve dogs
• Valve dogs seat
• Timing gear
• Cylinder mounting studs
• Complete gasket kit
• Bushings
• Bearings

This kit may take 10-12 business days to process, contact us if you have any questions.

No refunds or exchanges, all sales are final on this item.

Professional installation required.