Topic: High pitch noise or Howling from lower engine

[76supersport750F]

Hello  When riding at 5000 rpm and higher on the highway I hear a high pitch noise of howling from the lower engine clutch area.

Any one experience this? and what should I do or look for?

It goes away when I pull in the clutch lever.

Thanks

[1timduke]

Any recent oil changes?   Some types of oil are also bad for these wet clutches.   Does the noise accompany any performance issues like slipping?

-Tim

[76supersport750F]

The type of oil i put in when I got the bike was 10w40 Blend.   It was a really hot day when the noise happen.  I have change the oil to 20w50 and it seems better but I did not get the chance to get on the interstate and ride much.  There is still something there but not much at lower speeds.  I will ride it again on the interstate.  At lower speeds and on secondary roads it seem ok and not much a noise to bother me.

May be something is coming loose?  I am not sure.  May be it shows up when it is really hot?

I have only put 200 miles on it.    The bike has 16000 miles on it.

I will check back later and update.

Thanks