Strange Sound
 

Haven't ridden in 5 weeks. Took her out yesterday. Rode for about 15 mins and then realized that I missed my exit to my practice area. U-Turn. On the way back, I decide to hit it, 4th 5th then i get a strange sound around 7k it sounded like a rev limiter sound coming out of the exhaust. I pull over a rev. It sounds fine. I listen to intake, OK. Get back on, its doing it again 3rd and 4th gear 7-10k.

A freind says my clutch is on the way out. What do you guys think?

RE: Strange Sound
 

I should add that it cleared up later that day and that when it did it there was power loss.

I would hate to get banked over and not have the power, or worse need to get away in traffic.

RE: Strange Sound
 

perhaps crap in your fuel from sitting over 5 weeks?!?

RE: Strange Sound
 

Moisture maybe?

UPDATE: Strange Sound
 

I took her out yesterday. Cruising at 7k. Smoothly creeping up to 7.5 the sound starts coming back. Back off it goes away. Then it hits me: "I remember hearing that sound last time I rode her hard...at the track". What did I change before the track? I put on a PowerCommander map I got from Muzzy. It sounds like its running on 2.5 cylinders. Can a poor map cause this kind of sound coming from the exhaust along with lack of power and inconsistent firing?

RE: UPDATE: Strange Sound
 

Yep, it may be running too rich in that range. Rich will cause the exhaust to be a lil quieter and a power loss.

RE: UPDATE: Strange Sound
 

It's same volume but sounds sick (not in a good way). I'll look at the numbers on the map, but if I recall, it's leaned out in that range. Strangely I noticed that after slowing and coming for a stop at the next light, the noise point began to move down the rev range. It went to 5.5 then 3.5 then 2k. I got to my destination, shut down and then went home with less predictible problem. Bike wasn't overheating.

RE: UPDATE: Strange Sound
 

worst comes to worst, just disconnect the PC and run it without and see if you have the same issue.

RE: UPDATE: Strange Sound
 

Got the map. I sent you a e-mail back.

RE: UPDATE: Strange Sound
 

Have you checked the battery terminals? So often, you'll hit just the right resonance to jiggle a loose terminal. Since the F4i can't run w/o battery power you get stuttering and power loiss.