My bike came with a Loncin 124cc engine, clutch off crank. It is all black and has CDI on the cam cover. It says PL-4 on the side of the cylinder along with 124cm3 does anyone have any idea what bore and stroke this motor is and what size the valves are in the head? it has the oil plate with the short lobe on it so i assume it takes the long lifan cam dr atv carries.

I was hoping that it had a big valve head on it so i could use it on my (hopefully ordering this week) gpx motor

just wondering cause i dont want to pull the motor apart to check if i dont have to