BGF G5 Steel Sleeve Upgraded 66/80cc Silver 8mm Wider Intake Port (40mm) Cylinder Iron BORE with Intake Include for Motor Bike 2-Stroke Engine

Sadly mine failed because the cylinder did not come with any information or recommendations. I did not know you could not use the stock piston rings. This lead to cylinder and piston damage

if you have a motorized bike this is a must have.cyclender has a iorn liner in it.it will not wear like the chrome ones will!!!!it will last for the liffe of your bike.one thing not to worry about.please use cdh powers matching piston and rings.great bargin.

I don't know if all of them are like this but I had to re deck the top because the sleeve was above the jug the sleeve was high and twisted in the cylinder and the ports weren't debured at all and the cylinder isn't round/ true like not at all

Great sleeve. I had to clean up the ports on the sleeve. Minor detail work they made a big difference. My bike is running hard and fast.

Like

Sleeve was tilted and unuseeable

Sleeve was dead center. Very pleased. Wish they had more so icould buy a spare