[MaDd0g]

I had similar problems with mine a few months ago before I had all sorts of work done to it (for other reasons)... Try a NEW battery and also some sea foam additive to clean everything out.

After that I would do plugs & clean the air filters

Then probably look at changing the coolant to either evans coolant which is what I use or just a clean flush and some redline additive

Then if all that fails take it back to the tuner. I had my idle bumped up to where it idles at about 1300 rpm

 

[MaDd0g]

The battery should have nothing to do with the bike running bad or stalling.

See ZDM's response :-]

 

[MaDd0g]

I always take issue with someone who slams another member who is offering an opinion in good faith.
Disagree fine, but then offer a reply as to why instead of the above....

You did a great job explaining it. Thanks for taking the time to help the OP