new to 4 strokes - 40cc?

[plugpopper]

bought this recently with a bunch of other parts for 15. manufacture date of 10-15 so it's not old, very clean and has great compression. Can anybody tell me exactly what this is? Looks similar to a huasheng 49cc. carb was missing primer so i need a new one. any suggestions? the pull start is broke too but I have a couple that fit.

 

[ftw357]

139f SUPERBIKE DB40A look on eby 4 Stroke Gas 39cc 40cc Mini Moto Pocket Bike Dirt Bike I have 2 motors im yo sing on my bikes 4G or chane drive well work you well have to make your own mont