engine whine? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 14 Old 07-26-2006, 10:48 AM Thread Starter
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engine whine?

I've never had a FI bike before, so I'm assuming that the whining noise that my new 06 1K makes is from the injectors, correct? It's most noticeable when rolling on or off the throttle at less than highway speed.

Or is it something else? I'm not too concerned, although I find the noise a little annoying. My wife, however, thinks there's something wrong, because she doesn't think any other "crotch rocket" makes that kind of noise. I say it has something to do with the fairing and her close proximity to the source of the noise when she's riding with me, that makes her notice it.

So, let's settle this, is this whiny/whistling noise normal, or do I need to look under the hood to see if something is awry (I guess I'd look at the air intake/filter housing first)?
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post #2 of 14 Old 07-26-2006, 11:05 AM
 
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It might be chain noise. My Strom makes a lot more chain noise than other bikes I have owned. I think the main culprit is the teflon sheet on top of the front part of the swingarm. As the chain slides over it, it makes kind of a high pitched whining noise. It is usually most noticeable when you pass by a car or a solid barrier that reflects the noise back at you. The reason it gets louder when you roll on or off the throttle is the change in chain tension.
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post #3 of 14 Old 07-26-2006, 12:48 PM
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I've thought the same thing in the week I've owned the bike.

It's a distinct noise that I was trying to place... As I thought through it I noticed that it:

1. comes up through the fairing from the engine
2. seems most prominent when the throttle is either opening or closing
3. goes away in neutral and levels off at steady pace
4. sounds like a million metal bearings in constant motion

So I figure it must be the chain! It definitely has a metalic whine to it as well as clearly being associated with tensioning or relaxing the chain... I think the bike just feeds the noise through the engine and up through the fairing.
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post #4 of 14 Old 07-26-2006, 01:13 PM Thread Starter
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i agree that the noise is fed up through the fairing. that thing is like one of those megaphones they used as hearing aids in the old days. i never considered the chain, though, and will have to take a look at the swingarm for the piece of teflon you describe.
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post #5 of 14 Old 07-26-2006, 05:10 PM
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It`s the fuel pump. It`s in the tank.

Injectors make a clicking sound as they cycle open-close.

V.

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post #6 of 14 Old 07-26-2006, 09:20 PM
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What ever the noise is, I have it too. Very pronounced while riding along side a concrete barrier. Doesn't make any difference if the barrier is on the left or right side.

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post #7 of 14 Old 07-26-2006, 10:14 PM
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Huh??? Noise?? :lol:

I always thought it was the valve train gear noise. My BMW K bikes did the same thing..

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post #8 of 14 Old 07-27-2006, 12:26 AM
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Not trying to make light of this issue, but I have found the cure. Earplugs. There is no doubt that these are noisy bikes. It is the nature of the big bore V-twin. And as was said previously, the huge bucket mouth fairing is like a megaphone. I originally found all the noise quite disturbing, but eventually came to realize that there is a whole lot of engine down there, and that is what makes the bike interesting. I always thought the noise you were talking about was some sort of cam chain whine. Never really thought about it being injectors. Could be. In any event it doesn't seem to be anything to worry about. Between that racket and the wind noise, riding this thing was quite an attack on the senses.

I use cheap foam ear plugs. They filter out all the annoying high pitched crap and let you really hear the important stuff. My apologies to you all if I have been stating the obvious.
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post #9 of 14 Old 07-27-2006, 12:50 PM Thread Starter
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the noise doesn't bother me as much as it used to, it's just there. of course, if you don't know what it is, there is some concern, because when something goes wrong, it's often an odd noise that tips you off.

interesting that there is some differnce of opinion about its source. i was paying closer attention to it yesterday, and actually found two similar sounds that apparently are from different sources.

one is a whistle you can hear with the bike in neutral, while revving. it's not terribly loud (at least with my bad ears and a helmet on), and is most pronounced when you first roll off the throttle. i assume that this one is air or fuel system - related.

the other is a louder whine, and seems to be drivetrain related, because it disappears when you pull in the clutch while decelerating. it could be the chain, as stated above, or possibly the transmission. whatever it is, i'm assuming it is normal noise that would otherwise be less noticeable, if it weren't for the fairing.

i told the wife that i could always get a louder exhaust, if the noise continues to annoy her. :twisted:
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post #10 of 14 Old 07-27-2006, 12:57 PM
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Wow....have any of you ever owned, or ridden a Harely or Ducati? The Stroms are very quiet compared to them. MOST of the sounds that you hear, is coming from the cam gears and the valves/lifters. My 1000 really doesn't make much noise, I actually find it quieter than my previous Bandit 1200. Both the 650 and the 1000 have VERY dependable engines, just ride them with no worries. :wink:

You want quiet, get an inline 4 or a scooter! :P

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