Turkey 20k

My Massimo 500 is Hisun. Is it crap or fairly good quality?

I have MSU 500 with compression being low also. When you say to add oil are you pouring a little oil in the plug hole? Thanks

Does it sound like it's turning faster than normal? If so it could be a broken timing chain or it jumped off the gear. Mine did that.

Okay after good info which is much appreciated I figured out the problem. When the starting issue started I replaced the fuel injector with a new one. The new injector has 4 holes versus two on the original. I didn't think anything of it when I installed it. Any way it's putting too much fuel in and drowning the spark. Fortunately I kept the old one. I cleaned it up best I could and reinstalled. Reconnected the fuel tank wire and now she runs as before. I have ordered a new OEM 2 hole injector and hope to be riding again. Thanks for the advice on where to check.

Thanks for all the information. I will try to step through this. I'll let you know. Thank you 👍

How do you tell if valve is problem and how to fix?

Strange problem. My Massimo is getting fuel, fire, compression. Injector is working. Okay if I pop the injector off of the intake, the engine will run till the fuel that was injected in the cylinder is gone. Maybe a few seconds. When I reinstall the injector it won't start. Please help. Valve or timing issue. Thanks. PS - Also if I remove the intake valve cover and turn the key the fuel mist blows out. What is the cause of this? Thanks for any help.