"Whirring" in 5th at 4500 RPM? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 18 Old 06-13-2005, 10:23 PM Thread Starter
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"Whirring" in 5th at 4500 RPM?

Got 500 KM (300 miles) on my Wee and have found that when I'm riding at 80 KM (50 MPH) in 5th at 4500 RPM, there is a rhythmic hum or whirring sound.

Also, it sounded really rough today (hot and humid)-was the first time in 3 days that I took it out and it sounded as if there was no oil. The temperature gauge is consistently running with 4 bars and checked the oil level - the window was still full of that stock mineral stuff, though.

Not knowing much about small engines, are either of these something I should be concerned about?

Cheers,

Lang

-----------
'05 Blue VStrom 650
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post #2 of 18 Old 06-14-2005, 03:26 AM
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My bike has now been riden 3000 km.
I have/had the same "humming" sound on 5:th. When it went into first services at 1000 km I told them to check it. They said the engine sounded as it should and it might have been the slack on the chain, which they tightened. I think it hums less now, but I'm not sure. It sure is annoying and if it dont stop completely I will talk to the dealer again.

My temperature gauge has never been over 3, but I live in Sweden - not so hot weather here
post #3 of 18 Old 06-14-2005, 09:17 AM
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Mine has never been above three bars either and I live in Virginia. While I only have about 1k on the odo, I have done some two up ridding on hot days in the hills.

You say the Oil widow is full. Do you mean at the full mark? Putting too much oil in might cause problems.

650...Anything more than a handfull is wasted
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post #4 of 18 Old 06-14-2005, 09:29 AM Thread Starter
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No, I mean that I can't see the top of the oil level in the window, as was the case when I took delivery.
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post #5 of 18 Old 06-14-2005, 10:48 AM
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You should see it a couple of minutes after riding and when the bike is "levelled" - standing straight up.
post #6 of 18 Old 06-14-2005, 11:52 AM
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You should be able to see the top of the oil in the window when the engine is cool and the bike is level. If the whole window is filled with oil, then there is too much in the crank case.

My 650 has never had over three bars on the temp gauge, even during 90 degree stop and go riding. Check your coolant level while you're checking oil.

06 DL-650 - SilverBlue
05 DL-650 - red (RIP - watch your mirrors!)
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post #7 of 18 Old 06-14-2005, 03:10 PM Thread Starter
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well the oil situation is resolved (yes, I didn't have it on the center stand)....ugh.

Coolant is at "low" line - topped it up (50/50 mix) and took it out for a spin. 84F and pushed it harder than before, but the temp bars maxxed out at 3 - incredible what a cup of liquid will do!

So back to the original post, what about the whirring sound? Has anyone else other than k-strom and me observed the same? It only seems to happen in 5th btw 4k and 5k RPM.

(Continued thanks to all for helping me be less of a gomer when it comes to bikes and my 'Strom).
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post #8 of 18 Old 06-14-2005, 05:31 PM
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Sounds like a chain issue, if so should be able to duplicate it in each gear at the same rpms. Lubing and adjusting the chain sounds like it should be done. New bikes and or new chains need to be adjusted early in their lives and lubing every 300-500 miles.
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post #9 of 18 Old 06-14-2005, 06:39 PM
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I was out riding for 150 km today and really listened for the "humming" sound. And its really better since first services. So it might have been the loose chain, try adjust it. 2-3 cm slack i think it should be.

K-Strom
post #10 of 18 Old 06-14-2005, 08:07 PM Thread Starter
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Looking at the owner's manual, it doesn't seem to be too difficult to adjust the chain tension. Is that correct, or is there something I should be concerned with that the manual doesn't tell me?
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