Big bore kits and performance engine components for your 125cc or 150cc GY6 scooter

"I have owned 5 different scooters over the years. 250cc CFMOTO, Roketa 150cc 4-stroke GY6, United Motors 50cc 2-stroke and a SunL 50cc 4-stroke QMB139. I can rest assured that no matter what make or model I have, Partsforscooters.com will always have the parts I need. You have a customer for life!"
Mike R.-California

"I can say, without hesitation, service at your company far exceeds any other of the many distributors & manufacturers I deal with on a daily basis. Prior to opening my shop I spent 23 years as a project manager & customer service manager so I set the bar high for customer service & efficiency. Good job!" Bill Randall, President Fun & Functional Transportation

Big bore kits and performance engine components for your 125cc or 150cc GY6 scooter.

Hoca 4-Valve Cylinder Head Kit GY6

Part number: 169-167

Hoca 4-Valve Cylinder Head Kit Honda

GY6 180cc Power Kit

Part number: 169-99

180cc Big Bore Power Kit for 150cc and 125cc 4-stroke GY6 Engines. This complete Power Pack comes with a 63mm bored out Cylinder and matching Machined out Crankcase...

Hoca GY6 4T Power Pack

Part number: 169-162

Hoca 4T Racing Kit for 150cc and 125cc GY6 4-stroke Scooters and Engines. This kit includes everything you need to increase overall speed, horsepower and torque.

Hoca GY6 63mm Big Bore Cylinder Kit

Part number: 169-53

Hoca, 63mm Big Bore Cylinder Kit for 150cc and 125cc GY6 4-stroke engines and engine based vehicles.

Cylinder Set for 180cc Power Kit

Part number: 169-172

Cylinder Set for 180cc Power Kit

Hoca GY6 61mm Big Bore Cylinder Kit

Part number: 169-173

Hoca 61mm Big Bore Cylinder Kit for 150cc and 125cc GY6 4-stroke engines and engine based vehicles.

Hoca GY6 Ceramic Big Bore Kit

Part number: 169-278

Hoca 63mm Ceramic Big Bore Kit with Nikasil Cylinder Coating for 150cc and 125cc GY6 4-stroke engines and engine based vehicles.

Hoca GY6 Ceramic Big Bore Kit

Part number: 169-277

Hoca 58.5mm Ceramic Big Bore Kit with Nikasil Cylinder Coating for 150cc and 125cc GY6 4-stroke engines and engine based vehicles.

180cc Cylinder Head

Part number: 169-205

180cc Cylinder Head for the 180cc Big Bore Power Kit.

Hoca GY6 61mm Cylinder Head

Part number: 169-204

Hoca GY6 61mm Complete Cylinder Head for 150cc and 125cc GY6 4-stroke engines and engine based vehicles.

Hoca GY6 Piston Kit for 4-Valve Head

Part number: 169-169

Hoca GY6 Piston Kit for 4-Valve Head

180cc GY6B Gasket Set

Part number: 130-31

Gasket set for GY6B short-case engines with the 170cc and 180cc Big Bore Kits.

180cc GY6 Cylinder Head & Base Gasket

Part number: 130-32

63mm Cylinder Head and Cylinder Base gasket for the GY6 180CC Big Bore Head Kit.

Part number: 169-63

Piston Pin for 170cc and 180cc GY6 Big Bore kits.

Hoca GY6 Performance Piston and Ring Set

Part number: 169-61

Hoca Performance Piston & Ring Set. Choose from 61mm and 63mm sizes.

Hoca GY6 58.5mm Big Bore Kit

Part number: 169-314

Hoca 58.5mm Big Bore Kit for 150cc and 125cc GY6 4-stroke engines and engine based vehicles.