Loud Clunk - BMW Luxury Touring Community
 
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post #1 of 4 Old Feb 5th, 2008, 10:52 am Thread Starter
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Loud Clunk

After removing the FD, swing arm and transmission to do a front transmission leaking seal, new pivot bearings and the slave cylinder weep hole I now have a very loud clunk as soon as I start moving in 1st gear. Only happens the on the first cold move. Not warm. The swing arm and pivot bearings are NOT loose. It is something I took apart to do the above. I tiny little noise comes from the rear universal joint, but only by putting my ear up to the swing arm rotating in second gear. No unusual vibrations even at 60-80 mph. Oil did not get to the clutch. Suggestions please.

"A bad day riding is better than the best day at work."
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1998 Yamaha Virago 1100 (New to me Jan. 08)
1991 Suzuki GSX1100G ST (Retired at 97.4k miles)
1992 Suzuki GSX1100G (Replacement for 91)
2000 Suzuki DRZ400S (For City and Desert)
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post #2 of 4 Old Feb 5th, 2008, 11:51 am
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When you put the driveshaft back in, are you certain that it "popped" into the retaining clip? If it didn't, the shaft will move backward a little and allow the u-joint to hit one of the pivot pins, (DAMHIK). However, this usually is an always kind of noise, not just on start up.

GB

George Barnes
'06 K1200LT
'01 K1200LT, totaled with 180,000 miles, 10/18/07,

'97, '99, '01, '05, '07 & '09 Iron Butt Rallies, (won the '99)
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post #3 of 4 Old Feb 5th, 2008, 8:20 pm Thread Starter
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Clunk solved, read this!

When I did the tear down to do the front transmission seal replacement I fixed about 10 other problems. One of them was the ABS. I never heard it work before. I talked to dshealey who described my problem exactly. On the initial startup and drive a few feet, the ABS is doing it's diagnostic tests. It's a loud tin can crushing noise. With my helmet off and the side covers off it's really loud. As dhsealey said when the noise stops, the ABS lights go off. Ya thats right! I can put it back together and listen to the sweet sound of metal crashing in delight!

"A bad day riding is better than the best day at work."
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1998 Yamaha Virago 1100 (New to me Jan. 08)
1991 Suzuki GSX1100G ST (Retired at 97.4k miles)
1992 Suzuki GSX1100G (Replacement for 91)
2000 Suzuki DRZ400S (For City and Desert)
2007 Honda Accord (Meaning no more US engineered cars)
And 18 other bikes, 300,000+ miles, 43+ years riding experience
Retired Engineer, Sales and Maintenance Manager(s)
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post #4 of 4 Old Feb 5th, 2008, 8:33 pm
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My HD's would have a similar "klunk", morning sickness.

Problem was the clutch plates were sticking to the drive plates. First engagement would cause bike to "lurch" forward a bit..

To test it...

tomorrow morning, bike "off", put bike in gear, try to rock the bike... should feel it "holding". Now, keep pressure trying to move the bike and slowly squeeze the clutch... does the bike easily move?

...............
J.M.J...
Dcn Channing

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