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Author Topic: Clanking Noise  (Read 742 times)

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Offline bailboy

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Clanking Noise
« on: August 07, 2012, 10:31:42 AM »
  Long story, last night when i was riding home from work, i got half way home when I heard a noise.  This noise only happens when I am decelerating, engine braking, or braking with the clutch pulled in.  Does not make this noise while stopped and the clutch is disengaged. No noise when accelerating either. I thought maybe this noise was my chain rubbing the chain guard. I removed the Chain guard and this noise is still there.

   I have this weird issue with my rear drum brake.  Sometimes I have a firm pedal other times its REALLY soft and travels really far down.  After enough pressure it makes a clanking noise and shoots the pedal bake up and I can brake normally.  The bike is parked, I do not have a center stand anymore (4 into 1).  I checked my chain adjusters and they are tight, the rear wheel is not crooked according to the chain adjusters.  I did not have that much time before i came into work today.  Any input is MUCH appreciated! 

Bike is a 1973 CB750, new chain and sprockets.  Bike has been driven less than 500 miles since it was finished this spring 
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Offline ekpent

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Re: Clanking Noise
« Reply #1 on: August 07, 2012, 10:39:29 AM »
Better pull the rear wheel and check that brake out. Others have reported old brakes delaminating which could be very serious.
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Offline DJ_AX

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Re: Clanking Noise
« Reply #2 on: August 07, 2012, 10:51:48 AM »
Quote from: ekpent on August 07, 2012, 10:39:29 AM
Better pull the rear wheel and check that brake out. Others have reported old brakes delaminating which could be very serious.
+10
Total lock up is possible ... and that can end up very bad.
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~ Vincent . . . '75 CB750 K5 . . . '97 BMW r1100rt . . . had; '75 CB550 K1 (sold) . . .  '73 CB350G (gifted) HELL YEAH!
Disclaimer: I could be wrong. :)

Offline bailboy

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Re: Clanking Noise
« Reply #3 on: August 07, 2012, 10:54:42 AM »
Thanks guys!  Very glad I did not ride to work today.  Whenever i get a day off I'll take it apart. 
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Offline Bailgang

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Re: Clanking Noise
« Reply #4 on: August 07, 2012, 03:52:01 PM »
I just got the news after getting home from work. The bike in question is my kids bike who lives 3 hrs away and these long distant "fix it's" suck. Either my son or myself will keep you all posted on what he finds.
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Scott


71 cb350 twin
77 cb750 F2
83 gl1100 Interstate

Offline bailboy

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Re: Clanking Noise
« Reply #5 on: August 18, 2012, 10:19:55 AM »
UPDATE:  I found and fixed the clanking issue.  My brake arm was loose where it connected to the swingarm base.  The arm would move forward and backward almost a quarter inch.  Tightened it and no more clanking noise or weird brake lever issue.  I might buy a new brake arm for it.  But not a priority right now.  Kind of on a weight reduction binge.
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