The chinese built 139QMB Four Stroke 49cc Air Cooled engine is found in at least 99 percent of chinese and Tawainese scooters. This engine is a great one to hop and it comes easy. Scootertronics will add 47mm (72cc) 51mm (82cc) and 52mm (85cc) to one of these engines along with larger 95 jet Uni Air Filer plus trans upgrade with clutch and clutch bell plus kelvar belt and 5gram roller weights plus a high performance exhaust and your little cjinese scooter now boasts 50mph and no problem going up hills.
Scootertronics sells these scooters as custom built scooters with mod engines
Nuhaus
December 27th, 2008 at 8:39 am
Dude, turn off the drum machine. I can hardly hear a word you are saying.
london1817
December 29th, 2008 at 7:08 am
That is awesome!
I am going to have mine done so I can drive to work & not worry about cars on my ass!
I have heard here in NC that the scooter law is going to change where they can go as faster than 30 mph as of Dec. 1st.