Atv Troubleshooting Backfires during starting

Question edited for FULL 'make model (what it is)', from 'banshee'.
Question moved from Motorcycles to correct Category.

Check spark plugs.
Clean Carb.
Check timing.

More here, it is a known issue.

https://www.google.com/search?q=Yamaha+banshee+atv+backfires

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Have you replaced your spark plug? Check the fuel injector also,,,

double check the timing and timing chain tensioner. maybe a leak on the intake manifold?

new doesnt mean free from defects --floats may need adjustment or fuel adjustment not correct

Remove the seat, and take the cover off the air filter container. Place your hand over the end to aid in fuel flow to the carburator. You might not be getting enough fuel which is causing it to backfire and not start completely.
Attempt to start the ATV once you get fuel flowing you should be all set. Clean that filter as well.

if this has been sitting,,even if it hasn't, #1clean or replace the air filter, #2have the carb professionally cleaned and set, and #3 replace the spark plug.

sounds like a short in wiring system, from kill switch to your push button start on handle bar

if its turning over u may need to open and close the throtle a few times if its jus clickin u need to check the starter and sylenoid