Shuffling Sound

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29 Mar 2009 13:55 #276450 by grumpy56
Shuffling Sound was created by grumpy56
Hello all. Noticed a shuffling/hissing sound when I am at 1800-2000 RMP (up or down). Above or below that range, no noise. Sounds like an exhaust leak, but it only occurs when I am rolling. Replaced the tires not long ago, but can't seem to pinpoint where the sound is coming from. Any ideas are appreciated. Thank you.
1280
Lewis
1982 KZ1000-J2
2006 HD FXD35
1970 Suzuki T350
1972 Suzuki GT380 (In-Process)
In The Past...71 TM400, 72 H-D SS350, 72 GT380, 75 Z1B, 77 XLH, 79 CB750K
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  • trianglelaguna
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  • New and improved - extra strength
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29 Mar 2009 14:03 #276455 by trianglelaguna
Replied by trianglelaguna on topic Shuffling Sound
i dont know about the sound ...bot that bike is the s....that is one really nice jmodel.....mucho niceo....
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife

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29 Mar 2009 14:09 #276458 by Mcdroid
Replied by Mcdroid on topic Shuffling Sound
The noise is reminiscent of an exhaust leak at the head...check there first. Sweet bike!
Michael
Victoria, Texas

1982 GPz750
1977 KZ1000A
1978 KZ1000A
1982 GPz1100
1975 Z2A

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29 Mar 2009 14:30 #276467 by grumpy56
Replied by grumpy56 on topic Shuffling Sound
Thanks guys. But if I just rev it in nuetral, no hiss. Could that stil be an exhaust leak?
Lewis
1982 KZ1000-J2
2006 HD FXD35
1970 Suzuki T350
1972 Suzuki GT380 (In-Process)
In The Past...71 TM400, 72 H-D SS350, 72 GT380, 75 Z1B, 77 XLH, 79 CB750K

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29 Mar 2009 14:36 #276469 by Locozuna
Replied by Locozuna on topic Shuffling Sound
It's the bike whispering "I want to be in Loco's garage!" vawe vawe softwe! Then again I'm not sure I should be teasing someone called Grumpy! :blink:
[img

Sounds like an exhaust leak to me too.
KZ900LTD, KZ750LTD, KZ650, 72'Triumph Trident
"Over the Mountains
Of the Moon,
Down the Valley of the Shadow,
Ride, boldly ride,"
The shade replied
"If you seek for Eldorado!"

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29 Mar 2009 15:07 #276478 by grumpy56
Replied by grumpy56 on topic Shuffling Sound
Laughing Loco!
Lewis
1982 KZ1000-J2
2006 HD FXD35
1970 Suzuki T350
1972 Suzuki GT380 (In-Process)
In The Past...71 TM400, 72 H-D SS350, 72 GT380, 75 Z1B, 77 XLH, 79 CB750K

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29 Mar 2009 15:14 #276480 by gane
Replied by gane on topic Shuffling Sound
Grumpy, sound only in rpm range & rolling? all gears? sorry, trying to mentaly "type". quick things to dismiss, chain noise, rattling brake pads, body bits vibrating at resonating frequencies. Pretty Bike, I can understand your' Quest. G
[img][/img] 1977 KZ1000A1

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  • Limey
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  • 3 Years in the U.K. - Brought the KZ with me!
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29 Mar 2009 15:20 #276482 by Limey
Replied by Limey on topic Shuffling Sound
grumpy56 wrote:

Thanks guys. But if I just rev it in nuetral, no hiss. Could that stil be an exhaust leak?


Yes!

When the bike is not under load, the power, and pressure, developed in the cylinder is only enough to turn the crank (which is why you don't have to open the throttle much to get it to rev.). Under load, the conditions in the cylinder are MUCH more intense - so a gasket may not leak under no load, but leak like a sieve under load!
Eric
Newmarket, England (for 3 years)
Pentwater, Michighan (Home)
1978 KZ650
2000 ZG1000
2006 Suzuki Burgman 650

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29 Mar 2009 15:27 #276484 by Locozuna
Replied by Locozuna on topic Shuffling Sound
Also wondering if it could be a failing speedometer/speedometer cable? Wind pushing something in front against bike and resonating? I once got a bike that had a very lose/sloppy brake lever that would boogie at a certain RPM. Sounded horrible!
KZ900LTD, KZ750LTD, KZ650, 72'Triumph Trident
"Over the Mountains
Of the Moon,
Down the Valley of the Shadow,
Ride, boldly ride,"
The shade replied
"If you seek for Eldorado!"

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29 Mar 2009 16:12 #276501 by Mcdroid
Replied by Mcdroid on topic Shuffling Sound
grumpy56 wrote:

Thanks guys. But if I just rev it in nuetral, no hiss. Could that stil be an exhaust leak?


Unlikely...perhaps another KZR member can assist...
Michael
Victoria, Texas

1982 GPz750
1977 KZ1000A
1978 KZ1000A
1982 GPz1100
1975 Z2A

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29 Mar 2009 16:20 #276505 by grumpy56
Replied by grumpy56 on topic Shuffling Sound
Thanks for the comments. Any suggestions for how to determine if I do have an exhaust leak or how to pinpoint it? The sound appears to disappear at anything under 1800 or over 2000. I only hear it in that range whether accelerating, holding the throttle steady, or decelerating.
Lewis
1982 KZ1000-J2
2006 HD FXD35
1970 Suzuki T350
1972 Suzuki GT380 (In-Process)
In The Past...71 TM400, 72 H-D SS350, 72 GT380, 75 Z1B, 77 XLH, 79 CB750K

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29 Mar 2009 16:22 #276507 by grumpy56
Replied by grumpy56 on topic Shuffling Sound
Thinking as I type...what about a vacuum leak?
Lewis
1982 KZ1000-J2
2006 HD FXD35
1970 Suzuki T350
1972 Suzuki GT380 (In-Process)
In The Past...71 TM400, 72 H-D SS350, 72 GT380, 75 Z1B, 77 XLH, 79 CB750K

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