ringing while idling


14 replies to this topic
  • brandonmotocrosslife

Posted November 07, 2013 - 10:40 AM

#1

hey so after my bike had been sitting around for about 2 weeks and i started it up fine but when i was reving the bike in neutral i heard some ringing coming from the clutch box like maybe some plates had been worn or something. so i opened the case to inspect the plates and everything looked fine. i also checked the kick starter idle gear to see if anything was lose there and nothing was loose. so i made sure everything was in correctly including the torsion spring which was a pain in the butt to keep in it's hole and put the bike back together. i did an entirely new oil change including the filter started it up and it was still making the ringing noise....

 

any ideas to what it could be??? thanks



  • woods-rider

Posted November 07, 2013 - 10:42 AM

#2

Model and year would be helpful.

 

And maybe a video clip so we can hear the sound.


Edited by woods-rider, November 07, 2013 - 10:43 AM.


  • brandonmotocrosslife

Posted November 07, 2013 - 10:43 AM

#3

Model and year would be helpful.

wr400f 1998



  • brandonmotocrosslife

Posted November 07, 2013 - 10:45 AM

#4

cant give you a video but it sounds like change in your pocket



  • redhurricane

Posted November 07, 2013 - 11:46 AM

#5

without hearing it in person, initial feeling is crank bearings. really no way to tell without some investigation. Go buy a cheap harbor freight stethoscope and start listening to areas around the case, cylinder, head, etc.

  • 080

Posted November 07, 2013 - 12:08 PM

#6

your 100% sure its internals motor not external?

  • Krannie McKranface

Posted November 07, 2013 - 01:50 PM

#7

Probably something loose on the exahust



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  • Billyboypaints

Posted November 07, 2013 - 02:01 PM

#8

Make sure it isent something stupid like the top of the rear shock .locknut not tight .or shock bushings beat .hope its something like that .bill

  • brandonmotocrosslife

Posted November 07, 2013 - 05:25 PM

#9

your 100% sure its internals motor not external?

yup


Probably something loose on the exahust

no everything is nice and tight i had to take the exaust off anyways to get to the clutch plates



  • JDLowrance

Posted November 07, 2013 - 06:24 PM

#10

There is an intermediate gear between the clutch hub/clutch shaft and the crank shaft. The nut can work it's way loose and sound like jangleing change (Aussie change that is). You have to pull the R-H engine side cover to access it.

 

Had this happen on two of my Yamaha 4 strokes. The nut will not come completey loose as there is a lock washer (similar to the CS sprocket nut lock washer) that prevents this but it's still anoying none the less.


Edited by JDLowrance, November 07, 2013 - 06:25 PM.


  • woods-rider

Posted November 07, 2013 - 06:29 PM

#11

i had to take the exaust off anyways to get to the clutch plates

 

What kind of exhaust do you have? This sounds very odd to me.



  • Krannie McKranface

Posted November 07, 2013 - 08:37 PM

#12

yup


no everything is nice and tight i had to take the exaust off anyways to get to the clutch plates

 

Huh??



  • brandonmotocrosslife

Posted November 08, 2013 - 05:57 AM

#13

i had to take off the header in order to take off the case


What kind of exhaust do you have? This sounds very odd to me.

i meant header sorry



  • jackiefresh69

Posted November 27, 2013 - 01:16 AM

#14

bashplate?



  • dukesilver

Posted November 28, 2013 - 04:09 PM

#15

Ya, agree with bashplate.  Let it idle and simply put your hand on the plate.  See if the tone changes.






 
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