2012 yz450f no go

Hi guys. I posted up a few weeks ago that looked like my cam chain had jumped teeth while trying to start it.

I just replaced the cam chain and tensioner, on start up it took a bit but fired up and ran long enough for me to get off the bike then stalled and will not fire again after kicking for a while it fuels up and backfires.

I've double checked the timing marks which r spot on but still won't go.

Feels like its got good comp. could it b something with the ecu?

double check the timing on the bike, also it would be a good idea to check the valves to make sure they are not damaged or stuck open. If the chain slipped while the bike was running then you possibly could have some valve damage

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