What's the differrence between a GY6 and a Yamaha-linhai engine?

M

myam

New member
What's the differrence between a Honda based GY6 engine and a Yamaha cloned Linhai engine.Starting from the visual, and in performance wise.How do u know just by looking at them which is which and what's good in one that is not in the other and which one is better? I need it for a court case for an opening statement.Please help.I appreciate & owe whoever comes to my rescue.Please contribute anything.
I know a lot of people tend to say the same old thing as "u got a junk"or"that's what u paid for"...or negative about Chinese stuff.That's not what i wanna hear.I already know it and my son too thanks to some people out there with negative thinking.What do u want me to do if I don't have money like most of you for a descent bike? Ride the bus? So just help me out with this without trashing our scooter pls.
 
The Honda GY6 is probably not what you want information on. The GY6 is a generic designation that is used commonly to mean a 150cc 4 stroke engine initally of Honda design. Then there is the QMB139, a similar designation to mean the 50cc class engine with the same basic design.

I suspect you are looking at the 250cc class power plant. These are used in the larger 'maxi scooter' bikes from China and both the Yamaha Linhai and Honda designs are common. The Honda more so by a wide margin.

The differences and identification:

The Honda design is 244cc. horsepower may be reported from 14 to 16.75 hp... lots of 'fudging' in that area

The Yamaha-Linhai design is 257cc. horsepower may be reported from 16 to 20 hp. again, lots of fudging goes on with these numbers.

Most dealers of Chinese scooters have no idea what they are selling, just a sad fact and this is reflected in the advertising they use.

Here is how to know which engine you have in a particular bike.

The Honda design has a tilt to the rear with its cylinder. This engine is designed to fit a 10" rear wheel, and at this time I do not believe it has been made to fit anything other than a 10" wheel.

The Yamaha-Linhai design has a cylinder that lays almost perpendicular to the ground. If the bike has a rear tire of 10" it may still have this engine, but if it is a 12" tire the bike has almost certainly a Yamaha Linhai design.

Practical application issues are that the Honda design is much older and parts are widely available from almost any motor sport dealer even if they do not carry Honda. The engine is common to ATVs, dune buggy applications, snow mobiles and all manner of home build applications. The engine is very simple and easy to service.

The Yamaha design is more recent, and parts are not all that available, but not rare. The applications are still coming out for this design. It is not likely that it will replace the 244cc Honda design in any vast way although its ability to easily accept a displacement increase makes it somewhat of interest to the DIY folks. This design is not as 'user friendly' for maintinance service as the Honda.
 
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