CBR 600F4 1999 - 2000 Honda CBR 600F4 Forum

Grinding during deceleration

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Old Oct 4, 2007 | 03:45 AM
  #1  
Gone_Broke's Avatar
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Default Grinding during deceleration

I was just wondering if anyone else has had or heard this issue... During a downshift when the clutch is disengaged, I have a slight "grind" noise coming from the lower left side. I thought it might be the clutch but then I also noticed it while letting off of the throttle. Could the chain be hitting something during the transfer of power, or is my clutch starting to slip? I have no other issues except the b-b noise around 5k. Planning on doing the cct swap soon but other than that, I have no clue what this noise is...
Thanks for the insight...
 
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Old Oct 4, 2007 | 03:56 AM
  #2  
PlayfulGod's Avatar
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From: Dalton, GA
Default RE: Grinding during deceleration

ORIGINAL: Gone_Broke

I was just wondering if anyone else has had or heard this issue... During a downshift when the clutch is disengaged, I have a slight "grind" noise coming from the lower left side. I thought it might be the clutch but then I also noticed it while letting off of the throttle. Could the chain be hitting something during the transfer of power, or is my clutch starting to slip? I have no other issues except the b-b noise around 5k. Planning on doing the cct swap soon but other than that, I have no clue what this noise is...
Thanks for the insight...
the clutch is actually on the right side of the engine/tranny. My guess is its your chain tension is loose.
 
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Old Oct 4, 2007 | 01:15 PM
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slo_rdr's Avatar
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Default RE: Grinding during deceleration

+1 - mine will do that every now & then as for some dumb *** reason the tensioner bolt backs out.
 
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Old Oct 4, 2007 | 03:50 PM
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Default RE: Grinding during deceleration

just hope your gear jackshaft hasnt knocked the port through the engine casing outta round....

if it sounds fine while under power, centifugal force may be keeping it centered, then when the rotation speed declines it might"wobble" causing your front gear to line up improperly on your chain. check the teeth on the gear and the inside of the chain for pre-mature wear.
 
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Old Oct 4, 2007 | 11:21 PM
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Default RE: Grinding during deceleration

thanks for the feedback. I will definately check the chain tensioner as the rear tire was just replaced 2 days ago.
 
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