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Tranny whine?

  #1  
Old 08-11-2011, 07:51 PM
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Default Tranny whine?

Bike runs flawlessly, starts right up, shifts smooth everytime, no strange noises. But recently on an accidental shift down into neutral, instead of first, when I shifted into first I neglected to rev match. The rpms had dropped quite low as I was coming to a stop and debated leaving it in neutral. But deemed that unsafe so there was some hesitation and time for the engine to slow down almost to idle. I was doing about 30 when I shifted into first gear. I let the clutch out smoothly and just a bit slower than normal and it sounded like the clutch or tranny was whining. Is this normal because the engine was trying to catch back up to the speed of the rear wheel or did I damage something? I'm sure the clutch probably burned a little but the noise it made didn't sound all that great to me. Thanks for any insight.
 
  #2  
Old 08-13-2011, 10:37 AM
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No answers huh? Hmm I guess I wont worry about it then.
 
  #3  
Old 08-13-2011, 12:56 PM
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I've downshifted into first at that speed before accidentally too, but it just makes a high pitch whine until I gets slower (like below16MHP). However, I was slowing fast enough that it probably didn't matter.

If the noise happened and then is gone, you shouldn't have anything to worry about.

Check some YouTube videos of F4i's revving and see if you can hear the noise you speak of. If you can, then it is probably normal and you just never paid attention to it before.

To digress a little about noises, I just put on a manual APE CCTL and after I changed it, I heard a slight whining noise (unrelated to the CCTL) that I didn't hear before, but it turns out that the noise is normal and I just didn't pay attention to it before.

Keep us posted.

Cheers!
 
  #4  
Old 08-13-2011, 07:47 PM
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You didn't and won't hurt anything unless you rev past redline and blow your motor up OR you lockup the rear from engine braking and crash.
 
  #5  
Old 08-15-2011, 10:20 AM
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I am having the same issue, but the noise is there in all of the lower gears and it really concerns me. If anyone knows the answer I would really appreciate it. It seems to be somehow related to how tight the chain is.

Kyle
 
  #6  
Old 08-15-2011, 03:08 PM
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Is your chain too tight? I have a really tight spot in mine and if it somehow by chance stops on my front sprocket I can't shift the bike into first from neutral. I've tested this on a stand so I know that was the issue. Idk why it would make it whine though unless it's super tight and putting stress on something.
 
  #7  
Old 08-15-2011, 09:20 PM
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I'd PM Sprock or Trout. They both have extensive experience with whining trannys.
 
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