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Discussion Starter #1
Hello everyone. I have a noise/bad sound and I am not able to understand where it comes from.

My motorbike is a V-Strom 650 XT (2018), 6000 km
I tried to remove the crash bars and the wind screen, but the noise did not disappear. Crash bars are not the issue. I also clean and grease the chain very 1000 km. The chain has a 3 cm play.

The noise I hear is a sort of "uo uo uo" that starts on 6th gear from 4200 rpm. The frequency of this "uo uo uo" increases as the rpm increase.
I also noticed that on 2nd and 4th gear, from 4200 to 4500 rpm the noise coming from the engine is louder (it is like when you make noise with a glass using your wet finger).
At the end:
- 2nd and 4th gear from 4200 to 4500 rpm: louder
- 6th from 4200 rpa: louder + increasing "uo uo uo" (or vum vum vum...)

Two important things:
1) All noises disappear instantly when I pull the clutch. This should mean that the noise is not connected to speed.
2) The noises are not there when I put the motorbike on the central stand and I start up the engine and I accelerate to the 6th gear (i know that I should not do it...). This should mean that the noise "feels" my weight on the motorbike

I also bought earplugs but unfortunately I am still hearing the noise.

I know that I should ride and tell my self: "Who cares, the motorbike runs ok, so ride!", but the 4000-5000 rpm range is where I ride most.

Anyone with the same noise/sound?
Thank you guys!
Alex
 

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Discussion Starter #3
I have GIVI crash bars. I fixed the problem with the "rattle noise" when I was at 5.500 rpm.

I removed the crash bars and they were not the cause of this annoying noise/sound I have now.

This is not a rattle noise or a ticking noise.

This noise starts at 4200 rpm in 6th gear (I call it "uo uo uo sound") and it increases the frequency of the "uo uo uo" as the rpm increase. If I pull the clutch the noise disappears.

At the beginning I thought that something was wrong with my rear tire (perhaps bearings) but the noise is there just when the throttle is open.
 

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If it's what I think it is, it's normal. Or at least I think it's normal since my 650 did it since new. Like an oscillating wave sound.
 

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Discussion Starter #5
Yeahhhhh. You are right! It is an oscillating wave sound!!!! You got the point!

In my case it is an oscillating wave noise that increases the frequency like an old locomotive when it increases the speed (while I am increasing the rpm).

What I do not understand is why (almost) nobody does not hear it. Is it because I installed the Givi Airflow and mirror extensions that removed any turbulence?!?!

Anyhow I just would like to know what the reason is. Gearbox? Sprocket?
 

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Heh, I noticed it right after installing my Givi AF and mirror extenders too :grin2:

I can only guess, but since it's RPM specific I'm going with engine/gearbox.
 

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I’m thinking the chain should be looser. Have someone look at it when you’re sitting on it. 3cm is only about an inch. The Stroms like the chain on the loose side of the range and maybe a little more.


Sent from my iPhone using Tapatalk
 

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3cm is about an inch and a quarter, 1 13/64" to be pedantic.
@ale.opi
at 6000km you are due for a service.
Your chain needs light lubrication twice as often as you are doing it, and cleaning less than half as often.
 

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Highwayman might be on to something with the chain. On my 2017 650 I tightened up the chain after the 600 mile service
and it never had any gear whine at all. Then after - I noticed this oscillation sound at speed. Only at certain speeds and gears.
That was about 700 miles ago. I can still hear it but it's very faint now. Chain has a little more than 1 inch of slack.
Midway bottom run. It was about 2 inches prior. So OP it might be your chain is on the too tight side.
 

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The description sounds like transmission gear whine. Maybe the addition of a different wind screen brought it to your attention and now that you know, you can't unknow.
 

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Discussion Starter #12
The chain was a little bit loose but one week ago I brought the vstrom to the dealer for the service. The chain tension is Ok now.
The dealer told me, obviously, that he cannot hear anything strange.
I watched many videos on YouTube and I was able to find a couple of them where I can hear the same noise.
I think that the solution is to do nothing and keep the noise with me.
I am a little disappointed but the motorbike runs ok at every gear and there is no lack of power.
 

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Hi on my strom 2017, the vibration come from my rear peg when they are close. Try to run with the peg open to check if the sound stop. Have a nice day.
 

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Discussion Starter #15
The dealer changed oil and filter and set correctly the chain.
Footpegs are ok. Already checked.
I found now 4 videos on YouTube of v-strom having the same waving noise. 3 of them have the givi airflow.
Now I do think that all bikes have the same noise. You just hear it better if turbulence is almost zero starting from 70-80 km/h in 6th gear.
In 4th gear from 4200 rpm to 4500 rpm there is also the sound but it is less waving due to higher frequency.
The sound from 4200 to 4500 is completely different from under or above that range.
 

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I agree that you aren't lubing often enough. I lube every fill up. Takes 10 seconds on the centre stand. I don't clean the chain, ever.

Chain slack is important. My new bike came with a really tight chain. Crazy that the dealer would tighten it like that. It had maybe half an inch of slack on the centre stand. I would prefer to run the chain at the max in the range, which is 1.2 inches. My 650 I ran at 1.5 for thousands and thousands of KMs.
 

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Discussion Starter #17
I lube the chain every 500 km. I clean the chain every 1000 km. The motorbike has never seen rain or dust.
Chain slack was 5 cm. Now chain slack is 3 cm.
The Suzuki manual says that the chain slack, on side stand, must be between 2 and 3 cm. The dealer told me that if I have a passenger the slack can be more than 3 cm (but who cares, my passenfer is my 9 years old kid who weighs nothing since my wife rides her motorcycle).

Anyhow I would like to thank you everyone for helping me. Passing also my last week on youtube I discovered that all V-Stroms 650 have this noise, from Korea to Australia, from UK to US (just referring to those with good wind protection and microphone without wind noise). So let's call it a sound. My wife asked me if I was mad listening to all engine sounds on my iPad with earphones at max volume. Yes, I am mad. My kid helped me confirming this sound (in this way we were in 2, me and my kid, against 1, my wife).

Givi Airflow + Mirror Extensions + very silent Full Face Helmet + V-Strom 650 = Waving sound on 6th gear from 4200 rpm and on 4th gear from 4200 rpm to 4500 rpm.
If I ride using a modular helmet which is not silent I do not hear the waving sound.
It is what I have to pay to ride the best mid-size motorbike in the market.

The funny thing is that I passed 2 months to decrease the turbulance and the wind noise (Givi Airflow + Mirror Extensions are the best solution in my opinion) and I ended up with a new noise. I do think that it should be the gearbox but since I cannot do anything...who cares!
 

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Your welcome from all of us, Sometimes there just isn't anything you can really do to fix noises.
Many times what you hear is different than what others hear and so on. So whats actually going on
gets distorted. I had gear whine noises on my old bike. So the fact that they showed up on this
one was not a big surprise. You may find over time if you ride with ear plugs the noises are gone.
 

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I fixed my bike noise problems by installing speakers in my helmet and setting my music player to shuffle.
 
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