Cylinder Rebuilt Kits

4-Stroke 125cc Cylinder Kit

Specs: This Aluminum cylinder is for the 125cc horizontal motors. This cylinder won't fit those 125cc vertical style of motors. Now the kit comes with a high compression piston (curved piston dome, instead of the flat piston dome.

Uses 13mm wrist pin

4-Stroke 150cc Cylinder Kit

150cc Air Cooled Vertical Motor Cylinder Kit (uses a 62mm piston, 15mm wrist pin, 50mm wrist pin length)

Specs: 4stroke 150cc Air Cooled Vertical Motor Cylinder Kit

4-Stroke 200cc Air Cooled Cylinder Kit

200cc Air Cooled Vertical Motor 63.5mm Cylinder Kit

4-Stroke 200cc Water Cooled Cylinder Kit

200cc Water Cooled Vertical Motor 63.5mm Cylinder Kit

4-Stroke 250cc Air Cooled Cylinder Kit

250cc Air Cooled Vertical Motor Cylinder Kit

4-Stroke 250cc Water Cooled Cylinder Kit

250cc Water Cooled Vertical Motor 67mm Cylinder Kit

GY6 Cylinder Kit

GY6 125cc and 150cc Cylinder Kit

GY6 50cc Cylinder Kit

Specs GY6 125cc and 150cc Cylinder rebuilt kit

GY6 125cc Cylinder Kit (52mm piston, 15mm wrist pin)

GY6 150cc cylinder Kit (57mm piston, 15mm wrist pin, 42mm length pin)

2-Stroke Cylinder Kits

2-Stroke 47cc and 49cc Cylinder Rebuilt Kit

Specs: If your bike uses the 40mm piston ring, then you have a 47cc 40mm cylinder. The 49cc mini pocket bike motor uses the 44mm piston rings.

47cc 40mm Cag Bike Cylinder Rebuilt Kit

49cc 44mm Cag Bike Cylinder Rebuilt Kit

2-Stroke 43cc and 49cc Cylinder Rebuilt Kit

2-Stroke 49cc Cylinder Rebuilt Kit

Specs: The 49cc cylinder in this kit has been ported. Inside of the cylinder has been made bigger, so the cylinder can perform better.

49cc Ported Cylinder kit (for Mid bikes)

43cc Cylinder rebuilt kit

Specs: If you don't know if your motor is a 43cc or 49cc motor. The 43cc motor uses the 40mm piston rings, and 49cc motor uses the 44mm piston ring.