This happened to me a while ago, engine would bog down (kind of like when driving a stick and you go from 2nd to 5th) complete lack of power. I would pull in the clutch and it would quit. coast to a parking lot and it wouldn't start until about five min later, it would run fine till it started doing it again. did that about 4 times till I got home - 2 mile stretch. Cleaned out the carb and it ran fine since. Until today. Wife and I stopped at a park off the highway after about and hour riding mixed city/highway (bike ran fine). took a walk in park. Came back, bike wont start. Wait five min, starts reluctantly. drive about 15 miles, bike starts bogging down from 75 to 55 I throttled through it, then it went back to "normal" did that about 7 times on the highway with shorter times between it happening. I bought this bike used with 2650 miles on it. What is going on? Can you adjust the timing on this bike? I tracked fuel issues when this happened the first time it is not fuel related, or it doesn't seem like it. fresh fuel, premium gas-no ethanol.