I just bought this tlr with 6800 miles on it put it together, got it running, now I went to take it for a test ride and it will not get out of its own way. If it sits and idles for about 15-30 seconds it backfires and dies. I was expecting this thing to be an animal ...but something isnt right and idk what it is. I did the air box mod and the + mod Idk if either of these had an effect seeing as I did them before I ever heard this bike run... but any help as to what may be causing this would be really really appreciated. I want to ride this damn thing.