BIG BORE

BUGGY PERFORMANCE
150cc 
  • TrailMaster
  • Kandi
  • BMS
  • Roketa
  • Joyner
  • SunL
  • Dazon
  • Hammerhead
  • Twister
  • Blade
  • Carter
  • Baja
  • Tomberlin
GY6 150 Buggy Engine
BIG BORE KITS
  • 57.4mm  149ccStock
  • 58.5mm  155cc  
  • 61mm   170cc  
  • 63mm  180cc  

check your engine, the stamp on your cylinder block may include these numbers: 

         QMI152, QMI157, QMJ152, QMJ157 

NOTE: the 52 and 57 correspond to the bore size. 52mm for 125cc and 57mm for 150cc
Displaying products 17 - 25 of 25 results
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GY6 61mm Big Bore Cylinder Kit
Item No:
SALE PRICE: $203.45
Hoca 61mm Big Bore Cylinder Kit for 150cc and 125cc GY6 4-stroke engines and engine. Upgrades to 168.9cc (based on stock stroke of 57.8mm) Bore: 61mm Overall Height (cylinder): 93mm
View GY6 61mm Big Bore Cylinder Kit
GY6 150 Engine Oil Cooler Kit
Item No: PFS169-11
SALE PRICE: $230.95
NCY After-Market Performance GY6 125/150cc Oil Cooler kit. Designed to provide oil cooling and lubrication to protect the cylinder kit during high speeds!
View GY6 150 Engine Oil Cooler Kit
GY6 Oil Cooler Kit for 180cc Kit
Item No: PS169-488
SALE PRICE: $351.95
SSP-G Oil Cooler Kit for the 180cc Power Kit or any GY6 that uses an 80.5mm cylinder stud spacing such as Taida B-Block cases or the Polaris RZR 170.This kit comes with pre-drilled and tapped right side engine cases.
View GY6 Oil Cooler Kit for 180cc Kit
180cc Power Upgrade Kit, for GY6150 engine
Item No:
SALE PRICE: $436.70
180cc Upgrade. This complete Power Pack comes with a 63mm bored out Cylinder and matching Machined out Crankcase with all of the oil seals installed. This means there is no machining required unlike all other kits on the market.
View 180cc Power Upgrade Kit, for GY6150 engine
180cc Power Upgrade Kit with Oil Cooler, for GY6150 engine
Item No:
SALE PRICE: $604.99
180cc Upgrade with oil cooler. This complete Power Pack comes with a 63mm bored out Cylinder and matching Machined out Crankcase with all of the oil seals installed. This means there is no machining required unlike all other kits on the market.
View 180cc Power Upgrade Kit with Oil Cooler, for GY6150 engine
170cc (61MM) Power Pack, for GY6150 engines
Item No:
SALE PRICE: $623.65
Upgrade to 170cc with this Big Bore Racing Kit for 150cc and 125cc GY6 Engines. This kit includes everything you need to increase overall speed, horsepower and torque. Cam, Carb, Exhaust and much more included
View 170cc (61MM) Power Pack, for GY6150 engines
Cylinder Base Gasket, GY6 170cc (61MM)
Item No:
SALE PRICE: $7.99
Cylinder Base Gasket, for the GY6 170cc 61mm big bore kit. the stock size is 57.4mm
View Cylinder Base Gasket, GY6 170cc (61MM)
Piston Pin, GY6 170cc, 180cc
Item No: PS169-63
SALE PRICE: $11.85
Piston Pin, for the GY6 170cc and 180cc big bore kits
View Piston Pin, GY6 170cc, 180cc
Piston Set, GY6
Item No:
SALE PRICE: $51.82
Upgrade your GY6 150cc Engine up to 180cc with this Piston Set. choose your size. 58.5mm, 61mm or 63mm. fits our big bore kits. the stock piston size is 57.4mm
View Piston Set, GY6
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