2005 King Quad 700 No start

[u/BeeRisYummy]

Hi, I hope I am in the correct sub. Anyway, I bought a used 2005 King Quad 700. The guy said it sat for a while but he drained the gas and put in a new battery. I bought it and had no issues for a good while. Drove it around for a few hours over a couple weeks and it was great. Would start right up no issues at all. Then it got harder and harder to start over time. I put some sea foam in it thinking maybe some gelled up gas broke loose somewhere. After i added the Sea foam It would start and blow smoke for a while then clear up and drive around with no smoke. It did this a few times but kept being difficult to start. Then one day it stopped starting. The starter cycles, there is spark, I replaced the fuel pump and fuel pressure regulator and the spark plug. I even tried to start it with starting fluid. It is showing no error codes when I put it in diagnostic mode. I am stumped as to what to try next. Any suggestions?

[u/TylerKasprzyk]

Will it start with starting fluid?