Quote:
Originally Posted by Lyonsperf
BD1P390MB
1105163003
Thats what it says.
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According to the number configuration, but this is not always totally accurate. The only real way to be 100% positive is to measure the bore. You may void any warranties by doing this so it's a gamble.
BD is a identifier of the manufacturer.
1P indicates a single cylinder with a head particular to this model of gy6. it may not be compatible with standard gy6 150 cc parts.
390 as well as the MB indicate this is a 50cc motor.
The numbers series below is the motor serial number.
IMO... if possible try to get your money back. Specifically ask for a motor with the 157QMJ numbers.
1 = the number of cylinders
57 = the bore in millimeters of the cylinder
Q = a GY6 type engine
MJ= a numerical code for the displacement in cc's, in this case 150cc
The last two letters bear further explanation. The M is constant but the next letter ascends alphabetically with each larger step in displacement. MB = 50cc, MC = 60cc, MD = 70cc, MH = 110cc, MI = 125cc, and MJ = 150cc.
To further complicate this matter, specific manufacturers such as Quinjiang will put their own identifier in the code. An example of this would be QJ139QMB, a 50cc engine.
A "P" after the 1 indicates a head type on the 150cc engines that is sometimes not compatible with parts for the 157QMJ engine, so make sure with your parts supplier when ordering. An "E" in the code indicates a two stroke which is not a GY6; also a 250cc engine is not a GY6.