My bike (2001 honda f4i) (18k miles) started, what I call "stuttering" mid-cruise one day. After I get it home I did the following in order trying to fix the problem. I changed the oil, fuel system cleaner, octane booster, bought a new k&n air filter, replaced the $80 spark plugs, and today I put a new fuel filter in. While I left it outside to run for 20 minutes, I came back to a bike that stopped running. It has plenty of gas and I can hear the fuel pump when I flip the switch. I couldn't pop the clutch. What was the original problem and what is my problem now?