150cc Engine Manufacturer Identification?
 

How can the manufacturer of 150cc GY6 engines be identified? I understand there are 3 main manufacturers of GY6 engines plus some smaller ones. So how can the manufacturer be identified? This would be a good topic for a sticky and would be a great help for newbies to chinese 150cc GY6 engines looking for parts. Comments on the strengths and weaknesses of each manufacturer's engines would also be helpful to help us newbies know what to watch out for. Did buggy manufacturers always buy from the same engine company of did they change engine suppliers from time to time? Thanks in advance to all contributors to this thread.

Well am a newbies, don't know anything about how to find out the manufactures