For sure! K.I.S.S. is the way to go! I would pop the clutch off and have an actual look at what you've got going on in there. Its not a terrible job to do. This eliminates all guessing and really is your next step to diagnose this imo.
The idle is Def a good place to check. Sorry, my assumtions got ahead of me on this one!
It's not a bad thing to check, it's easy. Use an Allen wrench or feeler gauge. You want it set to approx 1mm. Before you go about setting needles etc, the VERY FIRST place you adjust js gonna be the idle...
First of all, welcome to RCNT! :welcome_sign:
Now down to business... :hehe: It sounds to me as if your issue is likely a pretty easy, quick fix. The 'engine clutch' is exactly where I would start looking. Make sure you haven't just worn them out. Although a single gallon of fuel does seem to...