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Old 09-07-2013, 12:23 AM
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mapbike mapbike is offline
Motorized Bicycle Elite Member
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Default Re: Next time a 4 stroke kit goes on sale for $200 again its mine.

Four valve head for the 150cc GY6, im thinking this must be what was seen and mistaken for being for the 50cc clone engine.

There is another 50cc chinese clone engine built for the chinese scooters also, its called the 139QMB engine.

Maybe im wrong on this but I have a GY6 in a scooter and have come across a pile of performance upgrades as I was working on it and doing several minor mods.

I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!

Last edited by mapbike; 09-07-2013 at 12:39 AM.
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