SuzukiSavage.com - Strange whislte (fixed)

klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: Strange whislte Reply #15 - 09/09/05 at 04:54:41 Primary gears are the one on the end of the crank and the one on the back of the clutch, if the teeth are cut at an angle they are helical cut and if the teeth are cut parallel to the axis of the crank/clutch then they are straight cut. Straight cut are more efficient but louder. Clive W
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torque Serious Thumper 2005 No Login Offline 2008 nightster,flat od green and black Posts: 748 rock hill,S.C. Gender:	Re: Strange whislte Reply #16 - 09/09/05 at 05:04:59 the gears are straight cut,but mine dont make a sound,make sure u have enough oil
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Savage_Greg

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Re: Strange whislte
Reply #17 - 09/11/05 at 08:27:58

Mambo wrote on 12/31/69 at 16:00:09:

Definitely.
The sound is audible when cruising, is louder when accelerating, and nearly disappear when slowing down.
In neutral there is no noticable sound (even at high rpm).

First we need to isolate the sound to either the engine or the chassis. You are in neutral, sitting still, with high RPMs and no sound? How about in 1st gear with the clutch pulled in, sitting still, and high RPMs?

Does the sound follow the road speed or the engine speed? Does the sound frequency steadily increase as you go faster, or does the sound frequency go up and down with RPMs as you shift gears?

I don't think this has anything to do with oil...just look at the sight glass and forget it.

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Mambo

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Re: Strange whislte
Reply #18 - 09/14/05 at 03:28:07

Ok, I've done some test

1. the sound increase with rpms.
2. there's nearly no sound in 1st gear and the 3rd is the louder.
3. there's no sound in neutral.
4. there's no sound in gear if the bike's not moving (even at high rpm).
5. if the sound is loud and I disengage clutch the sound disapear (even if RPM doesn't change).
6. the sound is more audible when accelerating and less when slowing down.

oil and filters changed -> no change
air filter changed -> no change
secondary belt waxed* -> no change

* old trick when a belt is squeaking is to "lube" it with some bee wax (I used that since many years for belt on cars)

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Ed L. Serious Thumper Alliance Member Offline "We All go a Little Crazy Sometimes" Norman Bates Posts: 2808 Sunny Florida Gender:	Re: Strange whislte Reply #19 - 09/14/05 at 13:00:00 Maybe the belt is too tight, just a guess. ???
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torque Serious Thumper 2005 No Login Offline 2008 nightster,flat od green and black Posts: 748 rock hill,S.C. Gender:	Re: Strange whislte Reply #20 - 09/14/05 at 14:21:35 torque wrote on 12/31/69 at 16:00:09: the whistle sounds like its the belt.the belt will "whine" if its too tight, just loosen it up a notch.. mambo said it wasnt the belt,he "waxed"it for some reason though?? ???. mambo,just loosen it and see if it stops,you have tryed everthing else!
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GaThumper

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Re: Strange whislte
Reply #21 - 09/15/05 at 19:05:17

Mambo wrote on 12/31/69 at 16:00:09:

Ok, I've done some test

1. the sound increase with rpms.
2. there's nearly no sound in 1st gear and the 3rd is the louder.
3. there's no sound in neutral.
4. there's no sound in gear if the bike's not moving (even at high rpm).
5. if the sound is loud and I disengage clutch the sound disapear (even if RPM doesn't change).
6. the sound is more audible when accelerating and less when slowing down.

oil and filters changed -> no change
air filter changed -> no change
secondary belt waxed* -> no change

* old trick when a belt is squeaking is to "lube" it with some bee wax (I used that since many years for belt on cars)

Sounds like it could be transmission noise. Is it more of a "whir" than a "whistle"? Did you see any metal when you changed your oil? Did it just start doing it or do you think you just now noticed it? Or has it always done it and it is just getting louder?

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Mambo

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Re: Strange whislte
Reply #22 - 09/16/05 at 05:03:34

It's very difficult the know precisely where the sound is coming from, but IMO the sound is coming from the top of the engine... not exactly where the transmission is (but of course, I can be completely wrong Undecided

).
Its definitely not a whirr. As I described it earlier it's sounds like the valves were runing completely dry.
I didn't notice something wrong in the oil (except it was dark brown instead of clear yellow the oil was "clean")
As far as I can remember the engine has allways done this sound (but I'm not the first owner of this bike).

I've got loosen the belt but not rided the bike since, so I don't know if it has change anything...

PS: once again I appologise for my bad english, I hope you can guess everything I'm trying to say ^^

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GaThumper

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Re: Strange whislte
Reply #23 - 09/16/05 at 08:22:00

First of all, your English is fine, so don't worry about that.

And welcome, by the way. Forgot to say that earlier.

According to your checklist, you only experience noise when the bike is in motion, is in gear, and the clutch is engaged, which would seem to point to the tranny and/or belt. The belt is still moving when the bike is in neutral or the clutch is disengaged, but you say there is no noise then, so that doesn't sound like the belt unless the belt is only making noise when it is under a load. If it were noise from the top end of the engine, you should hear it when the engine was being revved while the bike wasn't moving, but you say you don't hear it then. So it sounds like tranny noise to me unless it is a noise related to the engine or drivetrain being under a load.

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torque

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Re: Strange whislte
Reply #24 - 09/16/05 at 09:34:49

the belt will only "whine" if it is under a load,so if u disengage the clutch it will stop,until u engage it,also if u let off the throttle it will stop, but as soon as u accellerate it will start whining.

the sound comes from the sprocket that comes out of the transmission not the one on the back wheel.

if the belts too tight it will lead to premature wear of the mecanhical parts. 8)

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Ed L. Serious Thumper Alliance Member Offline "We All go a Little Crazy Sometimes" Norman Bates Posts: 2808 Sunny Florida Gender:	Re: Strange whislte Reply #25 - 09/17/05 at 06:46:39 Like I said before, maybe the belt is too tight. Luck on the noise.
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Savage_Greg

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Re: Strange whislte
Reply #26 - 09/17/05 at 07:12:12

torque wrote on 12/31/69 at 16:00:09:

mambo said it wasnt the belt,he "waxed"it for some reason though?? ???.

mambo,just loosen it and see if it stops,you have tryed everthing else!

I dunno. Has this been corrected?

Oh yeah, belt wax is an old Harley trick. You can also use soap, but that isn't the issue. The belt should be clean, though.

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Savage_Rob Serious Thumper Alliance Member Offline Mechanically Inclined Amateur Posts: 6972 Texas (Dallas area) Gender:	Re: Strange whislte Reply #27 - 09/17/05 at 11:23:02 Savage_Greg wrote on 12/31/69 at 16:00:09: Oh yeah, belt wax is an old Harley trick. You can also use soap, but that isn't the issue. The belt should be clean, though. I've even used soap on car belts - but more as a troubleshooting tool to help tell if the squeal was the belt or bearings on an alternator, etc.
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Ed L. Serious Thumper Alliance Member Offline "We All go a Little Crazy Sometimes" Norman Bates Posts: 2808 Sunny Florida Gender:	Re: Strange whislte Reply #28 - 09/17/05 at 13:25:38 I've used beeswax on fan belts, works great for a worn one. My favorite beeswax use is on stiff zippers (no I don't mean waxing the carrot ) like on a riding jacket or leather. Luck again with the noise.
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Strange whislte Reply #29 - 09/17/05 at 22:32:11 Ed L. wrote on 12/31/69 at 16:00:09: I've used beeswax on fan belts, works great for a worn one. My favorite beeswax use is on stiff zippers (no I don't mean waxing the carrot ) like on a riding jacket or leather. Luck again with the noise. I hate it when my zipper squeals too 8)
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