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Thread: loud click upon take off

  1. #1
    Phil B bullfrog_28560's Avatar
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    loud click upon take off

    Hello all, thanks again for previous responses to my posts, anyway, on my 86 R80, upon take off from a stand still, either 1st or 2nd gear, I get a loud click as I get moving. If i am rolling slow, and accelerate I sometimes get the same click, I hear it on the right rear and feel it in the right foot peg. looking at the manual and studying the way the drive is assembled, i am thinking that the click is from the drive shaft sliding in and out on the yolk as i take off and the suspension moves, like the mid 80's chevy trucks. Does that sound like a strong possibility? other diagnosis and suggestions are always welcome. I do not want to take apart for no reason. Thanks
    Phil Bouffard
    SSG U.S. Army
    Kaiserslautern, Germany

  2. #2
    Prefers to play martinph's Avatar
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    Is it a spoke wheel?
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  3. #3
    Registered User PeoriaMac's Avatar
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    86 R 80 has solid wheels. One of probably a lot of possibilities is that one (or more) bolts connecting the clutch output to the drive shaft has come loose. This has happened to me. Not a sure thing, but a possibility. There's a rubber cover held on with large hose clamps which
    needs to be pushed back to view the bolts. This is rare...but less so if you or a PO have removed the transmission or drive shaft and didn't torque the bolts property (or use new ones)
    mac
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  4. #4
    Registered User PAS's Avatar
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    Have you torqued the motor mounts lately?

  5. #5
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    Maybe it's your right hip joint or knee, how old are you?

    Sorry, couldn't resist.


  6. #6
    ONE LESS HARLEY 04r1150rs's Avatar
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    raise the back wheel and put it in gear, move wheel back and forth listening for click or taking up excessive slack in driveline.

    Inspect, drive shaft ( there is a torque coupling with ears that could have excess wear).

    Inspect- Drive shaft bolts to tranny output shaft, loosen rubber clamp at tranny and inspect.

    Ring gear rivets coming loose from flywheel, inspect by removing starter and check for movement, with kick starter if you have one. (Probably not this)

    Could also be-Clutch input shaft wear.

    -Excess lash on ring and pinion, or drive and driven bearing.

    -internal tranny issues.
    Richard
    2004 R1150RS
    1984 R80 G/S
    2003 Suzuki DRZ 400S

  7. #7
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    u-joint contacting swingarm/driveshaft housing?
    Ride Safe, Ride Lots

  8. #8
    Phil B bullfrog_28560's Avatar
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    alot of suggestions, i now have plenty to look at. I have the snowflake wheel, I have not torqued the motormount bolts. Oh and I am 38, not the hip as of yet.

    Thanks for the input I will follow up.
    Phil Bouffard
    SSG U.S. Army
    Kaiserslautern, Germany

  9. #9
    Phil B bullfrog_28560's Avatar
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    Click update

    ok, I checked all that was suggested, there is NO play in the drive shaft and parts, no play at the rear gear. motormounts are tight and its not my hip. When the bike is on the center stand, I run it and put it in gear let out clutch , cannot make the click sound, take the bike off the center stanf\d and stand beside it, letting out the clutch, cannot make the sound. It only clicks when my 195lb self is on the bike. any suggestions besides trimming up? I am 6ft so I am not that overweight. My hip is good also.
    Phil Bouffard
    SSG U.S. Army
    Kaiserslautern, Germany

  10. #10
    ONE LESS HARLEY 04r1150rs's Avatar
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    hum..shock mounts???? U-joint play??? did you pull the driveshaft boot back and check the four bolts at the tranny output shaft???
    Richard
    2004 R1150RS
    1984 R80 G/S
    2003 Suzuki DRZ 400S

  11. #11
    R100GS, '89 Guenther's Avatar
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    Sitting on the R80 changes the angle of the drive shaft. So with the symptom described I would guess the u-joints of the drive shaft.

    Could also be the load on the pivot bearings in the swing-arm/frame connection. Any change in load on the drive shaft would cause a rotating force like twisting the swing arm left or right. And according to the symptom description it would be the area where the right bearing sits in the frame.

    /Guenther

  12. #12
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    04 1150RS responded about checking the torque coupling on the rear of the drive shaft. That was the problem with mine. It was also making a clunking noise when accelerating.It's not hard to get to,remove the final drive,compress the splined coupling,remove the retaining ring and then the two parts of the coupling come right out.For some reason I not allowed to post pictures because I've already posted them before. If you want them PM me.

  13. #13
    Administrator 20774's Avatar
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    Quote Originally Posted by mohler View Post
    04 1150RS responded about checking the torque coupling on the rear of the drive shaft. That was the problem with mine. It was also making a clunking noise when accelerating.It's not hard to get to,remove the final drive,compress the splined coupling,remove the retaining ring and then the two parts of the coupling come right out.For some reason I not allowed to post pictures because I've already posted them before. If you want them PM me.
    First, it's not that you're "not allowed" to post them...it's the software that lets only one named image be uploaded to the server. If you had these images on a web server like smugmug, etc., you could link to your heart's content. Do you know the previous posts where you uploaded the pictures? Are they in this thread:

    http://www.bmwmoa.org/forum/showthread.php?t=37251

    Second, you reference an Oilhead model...are there similarities between it and the Airhead being discussed in this thread?
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  14. #14
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    Yes ,that is the thread with the pictures in it. The oil head ,04 R1150RS ,was the username that had responded to this question. He had said it was possible that the torque coupling may have some wear.

  15. #15
    Administrator 20774's Avatar
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    Quote Originally Posted by mohler View Post
    The oil head ,04 R1150RS ,was the username that had responded to this question.
    Right! Now I see that reference...sorry I missed it!
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

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