Hello new on here I have a china atv it's a ba250 and i have good spark about 175 compression and new carburetor I tried to start it and nothing and I also tried to spray starting fluid into the carb and still nothing please if anyone knows what else I can do that would be great I'm lost thank you in advance

 

A new carb does not automatically mean a working carb on Chinese stuff but, if you are sure it is OK, the next check is timing. First shine a light down the plug hole, watch the piston get to TDC when you turn the crank by hand, and check if the timing mark on the flywheel agrees with it. If the TDC mark is nowhere near, the flywheel must have slipped and moved ignition timing out. If that is OK, check the timing mark(s) on the camshaft. At TDC the mark on cam or sprocket should line up or be 180 degrees out, not often valve timing slips, usually due to a worn chain, but I had a Honda 400 with this fault two weeks ago.

 

yea I looked everywhere it does not have a timing chain cause that was what I was thinking

 

OK, Googled it and it looks like a Honda CG engine clone, which I think has gear drive camshaft, so extremely unlikely to slip. Have you checked the TDC timing for ignition? If that is OK, clean the old carb out by removing the jets and blowing them and the passages they came from out with an airline. If you still don't get a runner, maybe that spark isn't as good as you think.