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Post by ogle430428 on Aug 6, 2007 22:32:27 GMT -5
O.K. guys this is driving me nuts. I've got noise that sounds like it's in my trans. It does it mostly in 3rd,4th,and 5th. It happens at a steady speed I can speed up or slow down and it will stop. It sounds like the bottem end is going to explode when it does this. It also viberates like hell when it does this. I've tightened the chain and it made no difference and replaced starter gear so i've checked everything on the clutch side. It also makes a clunk when you put it in first. Kind of like it does when chain is loose. Anyone ever had anything like this?
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targis34
Full Member
'81 xs650 special stock
Posts: 186
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Post by targis34 on Aug 28, 2007 21:20:50 GMT -5
Hey Ogle....
Freakin Rattles drive me nuts and the xs is full of them. Fix ne and another appears. That said almost all the rattles I've had sound as if they are coming from the same place, in front of me. The windshield only made it worse. The worst noise I had was when the front sprocket nut loosened. It caused that thump into gear noise for sure. Check for night stand or kickstand rattling on pipes, loose side covers, wheel bearings, broken springs in the rear brakes, bad front brakes, exhaust leaks, chain (also make sure it tracks on sprockets right) chain guard rubbing..........anything I forgot guys??
Mike
I also had a freaking loud noise at low speed. A magnet had wedged itself between the frame and the rear sprocket. It hit the bolt when starting off and whined at any speed.
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Post by pamcopete on Aug 29, 2007 8:52:19 GMT -5
ogle430428
targis34 didn't miss much....I think we have all experienced your symptoms. So, to separate the noise from frame or engine, try revving the engine while riding with the clutch disengaged and note if the noise comes and goes with engine speed. Then try coasting down a hill with the clutch disengaged but still in gear. Also, the windshield does tend to magnify any noise and make it appear as if it is coming from the front of the bike, just as targis34 suggests, so if you have a windshield, remove it and try the tests again.
The one thing about your symptoms that I am troubled about is the apparent level of vibration. Of course, it's a chicken and egg deal.....it takes a lot of "natural" vibration to cause parts to bang together. I had a similar situation shortly after I got my bike and actually removed the engine and was going to tear it down, when I noticed a hole in the exhaust pipe that had been banging on a bolt, but only at 3,200 RPM....
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Post by Burns on Aug 29, 2007 16:02:07 GMT -5
This is a shot in the dark, but since your problem seems to occur only when there is light to no load on the clutch check your clutch assembly.
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Post by ignition on Sept 1, 2007 22:56:10 GMT -5
I would second the exhaust system. Check the cross over tube and the rear bolts. They can really rattle at 3-4k rpm!
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Post by shag on Sept 2, 2007 11:04:26 GMT -5
My fuel filler cap sometimes rattles,If i put my hand on it it stops.
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Post by Six-Five-O on Sept 2, 2007 14:41:13 GMT -5
If your machine still has the stock exhaust system on it, plus the center-stand. Be sure and look at the rubber bumper on the bottom inside of the left muffler..Right where the left leg of the center-stand ends...If that bumper is missing..the center-stand makes a rattling noise that comes and goes as the RPMs increase and decrease @ around 3K or so...I looked for nearly a hr once when my 82 suddenly started the same type of noise..The rubber snubber was gone and the left foot of the center-stand was making direct contact with the snubber bracket on the muffler. Good luck and please do let us know what you determine as the cause..
John
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Post by Phantom Phyxer on Apr 30, 2016 20:50:22 GMT -5
Did anyone ever solve this riddle?
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