Motorcycle was backfiring, then completely stopped firing up, but will turn over

[Cenglish]

The bike was running fine the other day.
Started it up today and was backfiring a lot for some reason. Turned the bike off and figured I’d come back to it later. Now the bike won’t fire up at all, but it will turn over. I’ve also tried bump starting it. It’s getting spark, I’ve cleaned the carbs, it’s getting gas, and I’ve also tried starting fluid and the battery is good.

I just need some help!

Is it compression or timing chain, does it need new rings and a piston. Could someone just give me an idea of what they think is wrong.

Thanks

[Miles_Ha11]

Have you tried to check your battery? A weak battery is one of the common reasons why you are having a bad start. You may want to check out your air filter as well.

[SamEdward]

Motorcycle's sudden Firing up, black smoke or cringe sounds alarm you of something messy in engine or battery. Do check battery first after that have keen look of engine.