bike whistling sound

[Random13]

Hello,

My 125 makes a whistling sound when reved which is not very loud and seems to come from the back area or gear box. it happens when the bike is in gear.

it happens mostly on 3rd and 4th gear. for instance when revving up can hear something going vooo vooooooo vooooooo as if the vo is representing the engine rev going up


any help on what it can be is much appreciated

[mudcow007]

you got a turbo fitted?

[Random13]

yes it is also supercharrged

[mudcow007]

is the whistling noise not just the noise of air through the air filter?

more revs = more air m'kay

[whitedevil]

Could be your power band slipping.
____________________
GPZ500 sold ~ CBR600FS-2 sold ~ ZX6R sold ~ Street Triple R

[Random13]

maybe then it is not whistling but not sure how to describe it .


maybe whining like this

https://www.youtube.com/watch?v=Qli4uQJJjrk

[bikenut]

unable to see/hear video in library full of bloody noisy kids!!!!!!!!!!

my bike makes a whistling sound at 90 so your lucky...........

anyways, noise which climbs with revs in 3 and or 4 th gear??

assume no similar noise in neutral or 1, 2 3rd??????

does it make the sound when bike is on centre stand and in 3/4th, be carefull it dont come off the stand and go thru your mums back window, it does happen!!

how is chain??

[Random13]

chain is fine and no haven't tried it on stand only but will give it a try

yes it is mostly noticable on 3rd gear even with helmet and the traffic noise so something is wrong.

could it be wheel bearing ?

[Vincent]

Has the noise just started? Or is it a new bike to you?
____________________
Space Is Deep

[Ariel Badger]

It is your battery or so says Robbie
____________________
Bikers make great organ donors, get 115 on your licence today.

[Random13]

now I have owned the bike for over a year.

I did put it on stand and no noise nothing at all even in 3rd gear 5-6 k which is when the noise is the most.

would it be the wheel bearing ?

I should say that most of the time I think I have overtighten the axle nut so maybe that has put the bearing under pressure?

[Vincent]

You shouldn't be able to put any stress on the bearing, the pressure of tightening the axle only acts on the inner ring. Different story if there's a spacer missing or incorrectly positioned though.
I was wondering if it was just clutch whistle - which is nothing to worry about.
Best way to test the bearings is to stick your finger through the middle, turn the bearing with your finger and carefully feel for any rough spots. Whar type of rear brake do you have? Drum or disc?
____________________
Space Is Deep

[Pol Anorl]

gearbox sound? worn dogs?
____________________
GOOD GAME BODYGUARD: https://i.imgur.com/8WePGgf.jpg
20:30:37 Pyro.: I don't sort of like men, I take every advantage to choke on dick.
Jewlio Iglesias: You live in Liverpool - Chances are, the front door has already been kicked off the hinges

[Timmeh]

I know, let's just offer lots of random suggestions, none of which OP will be able to interpret.

So, my purely speculative guess would be clutch basket rattle.
____________________
GSXR400 x2 | '94 RVF400 | '93 TZR125 4DL (again)
20:22:30 BLUEX5: i would love to be forced to undergo a**l plugging with different sizes
20:48:18 Temeluchus: comp you hunk of smouldering homos3x you

[Random13]

thanks,
I will try to work out what it is but what is worn dogs?

it may be gearbox as suggested