Chain keeps popping off

[xspade17x]

Every time I try to pedal start my bike the chain pops off. I've tried changing the back sprocket, realigning the rim and tire. Adjusting the tensioner. Nothing has helped.

 

[HumanPerson]

Try taking a link out the another if needed?

 

[xspade17x]

@HumanPerson Thank you. I'll try that and let you know what happens.