i have an 05 f4i street bike, and picked up an 01 as a track bike. it was wrecked. it tumbled. i don't know if that had anything to do with the noise i'm hearing.

my 05 makes a slight whine when running. it increases in pitch when you rev it. i can hear it, but it is not pronounced. on the 01, it is LOUD. i don't dare rev it over 7k it is almost deafening. even with a loud pipe.

obviously the whine is the nature of the beast, but not that loud. i was thinking it might be the cam chain too tight. maybe the wreck jarred the cctl and it's pressing too hard on the chain. would it sound like that? i remember reading about adjusting the APE manual tensioners, and there was a sound it would make when it got too tight.

[edit] i replaced the stock cctl with the ape, no difference [/edit]

any other ideas? it's not an exhaust leak, the fuel pump, radiator fan, or anything airbox related. it is coming from the top end as far as i can tell. it has 12k miles on it.

thanks

 

it sounds kind of like a supercharger whine.

 

nobody? don't tell me i'm going to have to take this into the shop

[:'(]

 

Did you check for a supercharger?

No seriously though, take the bodywork and tank off. Run it and try to find the noise. Use a long handle screwdriver to help pinpoint the location. Keep in mind that once the fuel tank is off, you won't have much fuel in the system.

 

if anything the APE would contribute to the noise.

 

i loosened it (until it rattled) and tightened it - it had no effect on the whine.

 

iam sure it's the ape. it pushes on the cam guide which gives it a wine sound.its located on the right side on back of the motor. don't worry about it