Hey guys I bought an old beat up 150 cc quad I'm pretty sure it's a 2000 kasea skyhawk but when I got it it did not run at all. I bought a new battery n it started but did not run that we'll I test drove it to see what was wrong with it but when I tried to start it the next day no start. It has spark n gas but no compression at all

 

Think you found the problem. Has to have compression,spark,fuel and air to run. I'd tear the top end down and check out the piston and cylinder and valves if it's a 4 stroke. Other members can help you further on parts if needed,etc.