99 honda trx 300 wont start???

got a 99 honda trx 300 4x4 it sat for about 2 years in a garage. changed all the essentials. plug, battery, gas. oil/ filter/ air filter and carb. still cant get the damn thing to start. just turn over a few times once i primed the carb with the primer plug and then it dies once the gaas is gone. i checked the gas flow and that dont seem to be a problem either. backfired once while trying to get it started. NEED HELP My local atv shop wants 85 bucks just to look at it

Take the carb completely apart, clean it. Make sure to get every hole and passage cleaned out including vent lines and adjust make sure the float is adjusted properly. I assume when you checked fuel flow, you checked it by turning the fuel petcock on and watched fuel flow from the tank? If you are getting fuel through the petcock, and the bike runs when you prime the carb, then I would think that you are not getting fuel into the carb. In that case I would suspect that the float is your primary problem, but I would still give the carb a thorough cleaning if you haven't already.

I would do what DD said..sounds like a fuel starvation issue to me. All the lines to the carb on corectly?

i replaced the carb and yea got it running checked plug and oil and finally got it started and idling nicely. now when i give it gas it when im in gear it doesnt want to throw full power down like its struggling any suggestons.

Still sounds like a fuel issue.

Did you put a brand new carb on it? If it is used, then take it apart and clean it. If new, then I would try re-jetting. What does the plug look like?