Backfire problems

My quad constanly back fires I thought it was A/F so i threw the wideband on it and Seen it was running like 10:1 under a load so i leaned it up (12.8:1)and its back fireing more…I am assuming this is an ignition issue can someone Varify that it is?

its still in the wrong spot!!!

I need some love here… no one looks in here!

pm eurodad

points if it has them. im used to the old school ones i don’t know anything about these newer ones