copy and pasted from my post in the f4i section...

so i was riding to work today ('01 f4i) and everything was fine for the first few minutes then i was sitting at a stop sign and the rpms started to drop and it was idling at or below 1000 so i gave it a little gas to keep them up so it wouldnt stall out on me. i finally get a chance to cross and the bike barely makes it across the street and starts bouncing between like 500 and 1000rpms and wouldnt rev when i twisted the throttle. The fi light came on then it died on me about 10 seconds later and wouldnt start back up.

After i got off work i tried starting it again and the fuel pump primed but it sounded real weak. It was a real low pitch buzz not the usual whine. So i was like whatever ill give it a shot and pushed the starter button. The bike started and idled at about 1000rpms for a second or two then died. So after that repeated 2-3 more times i just pushed it home then tried starting it again. The bike ran for about 10 seconds then finally shut off again. I tried revving it during that time and all the other times as soon as id start it but it wouldnt rev. Sooo does this sound like my fpr is bad? I was gonna replace it the other week when my bike seemed a little sluggish but ive been so busy with work ive never gotten around to it. Im hoping i didnt burn out my fuel pump since id much rather just spend the $50 on a new fpr to solve the problem.

 

I was running into a similar issue with my RC51, dunno how much of it can help you. If you want to see if your FPR is faulty, take off the vacuum hose from the top of it (if you imagine the FPR is a top hat). Mine doesn't have a clip on it, but yours might, but you should know which hose I'm talking about. With it off, prime your fuel pump and if it leaks, then it's faulty.

I had the exact same problems as you. It started as my bike dying on me at lights and eventually it just started dying mid ride and if it did start up it would have trouble revving and my tach would be flying randomly between 1k -5k and sputtering when I did rev it and a couple times it wouldn't start at all and I had to drag the ****er back home over 3-4 miles.

It was a combination of my kick stand switch going bad and a bad PowerCommander. I crossed the kickstand switch wires, took out my PCII and replaced my rear (sub) harness, but I'd start with doing the FPR check, making sure none of the hoses under your tank are pinched and then go over random wires with a volt meter. A trick my friend told me is that you could get the bike running and spray some water and see if you can notice any water evaporating off any of the wires, it'll tell you if you've got too much resistance.

You could also try running a fuel system cleaner like Lucas or Seafoam.