Strange "woo, woo, woo" noise when in gear

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TheDak

Pack Dog
Joined
Jan 23, 2015
Messages
483
Reaction score
12
Bike
KTM 990 Adventure
Hi Guys,

Not ture if you can make any wild guesses or suggestions but I have a kind of woo, woo, woo sound in 3rd gear that starts from about 4k rpm to 5.5k rpm, gets worse as the rpm goes up, seems to only do this in 3rd gear, pull in clutch and it's gone so it's not tyres or anything. I cant tell if it's coming from a certain area and don't feel any odd vibrations.

Recently did the major service and no metal parts on any of the magnets or screens, checked valves and all in spec

I tried to record the sound but wind noise took over
 
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