On Sunday my wife and I took a ride on our Scouts (shakedown for a coming trip) and about 50 miles in, she began complaining of surging-then occasional engine cutting out- 100 miles in and it was embarrassing. Revving up and down, cutting out-so I took over for the limp ride home.
It was a nightmare, bucking and cutting out, and when I tried to rev it a it higher it was truly nasty.
I had a lot of theories, pulled a code when the check engine light came on-"throttle position deviation". Hm.
Well, being under warranty I called the dealer who came out right quickly to pick it up. Today they called-all better.
The mysterious EFI error? A rodent had eaten a hole in the air filter and a small piece of string/whatever was snagged in the throttle body. Hell if the bike was out of warranty I'd have found it and fixed it that night!
Darned newfangled bikes.