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Thread: R60/5 Driveshaft

  1. #1
    Registered User kentuvman's Avatar
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    R60/5 Driveshaft

    Happy 4th Gang! Enjoy your holiday!

    My R60/5 has @ 80k on the clock (or so it says - found out my FD and Speedo are mis-matched - 37/11 W1155) So maybe not really 80k but who knows? She runs strong - all that matters to me.

    So if I take off slow I'll get a rattle - clutch is new and tranny is strong - wondering . . . do the "U" joints wear out and if so, what is the RX?

    Thanks again.
    Ken Tuvman
    Excelsior, MN
    K75s, R65LS, R60/5

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    Administrator 20774's Avatar
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    I think there needs to be more information as to a "rattle". Do you have a sense where it's coming from? Same rattle in say 2nd gear? Only when taking off?

    What service have you done on the drive train? Have you checked the four bolts that connect the shaft to the transmission?

    U-joints do wear but it's not a common thing that I've heard.
    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!

  3. #3
    James.A
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    The first thing I would do is to make sure that the bolts holding the U-joint to the transmission flange have not loosened themselves. Other things to check would be the swingarm pivots and maybe the long motor mount studs thru the frame. I have never experienced the rattle you describe, and I have never experienced a bad U-joint on an early airhead.

  4. #4
    Registered User kentuvman's Avatar
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    Thanks - the rattle only will occur if I let out the clutch fairly quickly in 1st - only 1st. If I keep adding throttle while letting out clutch, no rattle. No rattle in any other scenario - no other gears or when riding along.

    Driveshaft bolts (no washers) are new and tight - used the rag & 10mm and pulled snug, and so are studs holding motor to frame. Will double check the DS bolts.
    Ken Tuvman
    Excelsior, MN
    K75s, R65LS, R60/5

  5. #5
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    U-joints do go bad. What happens when you spin the rear wheel with the bike on the center stand? Hear any noises? What about when pushing it around the garage?

  6. #6
    Registered User kentuvman's Avatar
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    Quote Originally Posted by photorider View Post
    U-joints do go bad. What happens when you spin the rear wheel with
    the bike on the center stand? Hear any noises? What about when pushing it around the garage?
    I'll check - maybe an oversize rear tire as it won't spin on C/S but will push around garage and listen. Thinking it could be the D/S - once owned a Volvo 122s and when U joints went bad it had a similar rattle noise coming out the chute from stop to go in 1st.
    Ken Tuvman
    Excelsior, MN
    K75s, R65LS, R60/5

  7. #7
    Registered User kentuvman's Avatar
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    Just thinking here . . . if rear tire IS oversized, wouldn't that put more pressure on D/S when taking off? Size of tire is 110-90-18
    Ken Tuvman
    Excelsior, MN
    K75s, R65LS, R60/5

  8. #8
    Administrator 20774's Avatar
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    A 110/90 is not THAT oversized...it's still an 18" tire, just wider than normal. Now if it were a 19 or 20 inch tire...that's tall and would need more oomph to move it. I don't think that's the issue. How's the clutch cable adjustment? Did you use the "Tom Cutter" method? Maybe you're getting imperfect slippage and the disk/pressure plate are bouncing until they seat.

    You said you let out fairly quicly in 1st. What happens if you feather it in more? If it doesn't rattle, then I'd change your method of engagement in first.
    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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    Won't spin with the bike in neutral on the center stand??

  10. #10
    Registered User kentuvman's Avatar
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    Quote Originally Posted by photorider View Post
    Won't spin with the bike in neutral on the center stand??
    Nope but front tire, 100/90/19 does spin freely on c/s.

    If I feather clutch from stop to go, no rattle. Maybe Kurt is correct - could be new clutch hasn't seated yet and IIRC I lost my sharpee markings when I R&R the clutch.
    Ken Tuvman
    Excelsior, MN
    K75s, R65LS, R60/5

  11. #11
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    You are lifting the rear off the ground when you try to spin it, right? If you are and it still does not spin, something is definitely wrong.

  12. #12
    Registered User kentuvman's Avatar
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    Quote Originally Posted by photorider View Post
    You are lifting the rear off the ground when you try to spin it, right? If you are and it still does not spin, something is definitely wrong.
    What I'm saying is rear tire won't spin on centerstand - I'm sure if a helper lifts the rear rack, it will spin.
    Ken Tuvman
    Excelsior, MN
    K75s, R65LS, R60/5

  13. #13
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    Yes, of course it won't spin if it's on the ground. You can kneel or sit behind the bike, push up on the rack with one hand and spin with the other. If it rattles, I would suspect a worn U-joint.

  14. #14
    Registered User lmo1131's Avatar
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    - maybe an oversize rear tire as it won't spin on C/S but will push around garage and listen.
    Slip a scrap of 1/2" or 3/4" plywood under the centerstand. Depending on the size you may have to mess around with the position of the wood so that as you rotate the bike up it won't slip off. It's a bit of a grunt single-handed so having a buddy to help wouldn't hurt. Once it's up, rotate the bike onto it's front tire and slip something under the oil pan to keep the rear tire off of the ground.

    edit - as you can see, it doesn't take a whole lot of "thickness" to get the tire off of the ground. A chunk of 1/2" ply should be more than enough.

    "It is what you discover, after you know it all, that counts." _ John Wooden

    Lew Morris
    1973 R75/5 - original owner

  15. #15
    Administrator 20774's Avatar
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    Quote Originally Posted by lmo1131 View Post
    Slip a scrap of 1/2" or 3/4" plywood under the centerstand. Depending on the size you may have to mess around with the position of the wood so that as you rotate the bike up it won't slip off. It's a bit of a grunt single-handed so having a buddy to help wouldn't hurt.
    I've found that if I roll the front tire up onto a small piece 2x6 or 2x12 first, then slip the piece of wood (I use a 2x4) under the centerstand, it's not as much of a grunt to get it up and over. It then easy to remove the wood under the front tire and you can rock the bike forward if necessary...it will settle to the back naturally.

    BTW...often wondered this but never tried it out...if you have the bike on the centerstand, the center of gravity is behind the centerstand. If you remove the rear tire, does the center of gravity shift in front of the centerstand?
    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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