spline lube and transmission questions

Discussion in 'Airheads' started by apt13, Jan 28, 2012.

  1. disston

    disston ShadeTreeExpert

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    Remove transmission. Post pictures of splines.

    To answer your question, this does not make sense. What was done to get bike back in service after 22 years being idle?

    Have you checked cable adjustment?
    #41
  2. MaraBiker

    MaraBiker Vozi Miško!

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    I had the same issue with my bike. Bought it with 33.450 km on the clock, and drove it about 2000 km when it suddenly stopped with no previous signs of worn out clutch. It produced unbearable grinding noise on clutch release which I thought was coming from the transmission. Luckily it was worn out clutch splines that where making that sound.Input shaft was not damaged. Mechanic said it was the first time he saw this. I never had any discussions on this with him, so my problem was solved with new clutch plate.
    #42
  3. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    Splines may be shot-- I seem to recall that there was a couple year's model's that has splines that wore quickly. Or, OTOH, the non-flywheel clutch carrier assembly has been known to break the rivets that hold it together. Or, OTOH^2, the bike may have 104,500 miles on the clock.

    Pull the tranny and give us pics. Gap Season starts in March, so there's time to get on the road again... :D

    --Bill





    PS-- "GapRunr Dual Sport Touring" Just visited. Nice stuff. Your store?
    #43
  4. MaraBiker

    MaraBiker Vozi Miško!

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    #44
  5. supershaft

    supershaft because I can

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    Any airhead that has been setting for 20 years should have the splines lubed. It's the bikes that are being ridden regularly that usually don't need it. I have seen new bikes strip their splines, high mileage and low mileage bikes, old bikes, lubed bikes and not lubed bikes. Dry and rusty splines are not a good thing? Any lubed spline will look dry and rusty in a matter of a few thousand miles. I would recommend lubing them every 3000 miles if that is what you think the problem is.
    #45
  6. GapRunr

    GapRunr Been here awhile

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    I'm heading over to my friends house Monday where the bike is being worked on. I'll get some pictures of the clutch spline and input shaft. The clutch spline was shot, and the input shaft was borderline.

    After 22 years of storage the bike got all new fluids, and anything that was rubber or plastic got changed. Tires, tubes, fork boots, seals, etc. Clutch pull was smooth and gentle.

    I checked cable adjustment as well. All was good. I've heard that some of the early g/s bikes had soft input shafts, sounds like I got one of those...
    #46
  7. GapRunr

    GapRunr Been here awhile

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    Thanks! Yes, my wife (Workerant) and I own and run this business. We've got a blurb about us on our web page under where else, "About Us"!
    #47
  8. supershaft

    supershaft because I can

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    I don't think any specific model or year has much to do with it with airheads, oilheads, or K bikes. Personally, think it is clutch hub metallurgy. Whatever it is, it is something that all the above models share.
    #48
  9. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    Then you do know that it is the clutch plate splines shot-- you're ahead of the game, then. And it looks like the bike had all the proper "TLC treatment". Oh well, stuff happens. Get this out of the way and you can have a bulletproof transmission that'll last 30 years...

    --Bill
    #49
  10. AntonLargiader

    AntonLargiader Long timer

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    Yes; the first few years of the non-flywheel bikes had some problems with the clutch carriers. I would replace the entire clutch - carrier to cover - and of course the input shaft. Then you'll be set for a long time.
    #50
  11. disston

    disston ShadeTreeExpert

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    The clutch carrier which replaces the heavy flywheel starts in model year 1981.
    #51
  12. AntonLargiader

    AntonLargiader Long timer

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    I think the problem was mostly '81 and '82. Snowbum probably has something written up on this,
    #52
  13. supershaft

    supershaft because I can

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    What are the early carriers suppose to have a problem with and the later models don't?
    #53
  14. ME 109

    ME 109 Long timer

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    I have an 81 with all original clutch components except for a friction plate, and have just replaced all bearings in the tranny, input shaft spline is very good.
    257,000 kilometres.
    #54
  15. supershaft

    supershaft because I can

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    Is your bike an exception to a rule we have never noticed? I highly doubt it but we can still learn. I am still wondering what the issue is. Loosening starter ring rivets? They all rarely do that. What does Snowbum say about it? I'm not wading through that to find out. At least half of what he goes on about he pulls from his ass so even if he is right on this subject I am not going to believe it without more backup. IMO it's foolish to do otherwise.

    The OP's clutch? If the starter ring rivets are tight, chances are the carrier is perfect. If the pressure and cover plates are not warped TOO much (they ALL warp at least a little), put them back in. You have less than a 50/50 chance for that in my experience but it is worth checking. Replace the friction plate and spring. Check the clutch rod and bearing. Your done!
    #55
  16. emmaroseknuckles

    emmaroseknuckles n00b

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    I have a 76 R 90S....exchanged regular transmission fluid recently (5 months ago) to redline brand...shortly thereafter, when I started from a stop, the bike would lurch as I engaged the clutch....sometimes dangerously so! When it was warm, it would start to do this after a short time; now in the winter, it would take longer before it did it....i.e., seems to worsen after it warms up...okay, help.....what have I done with this !@#$$%^^&&*(())_+ Redline? thanks for you imput, people! rmb
    #56
  17. supershaft

    supershaft because I can

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    It has nothing to do with the oil unless your clutch has been getting oiled the whole time and it doesn't care for Red Line. Chances are your clutch splines actually need lubing.
    #57
  18. some_guy

    some_guy Been here awhile

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    Not to hijack this thread but, I pulled my trans out today to clean/lube the splines. The youtube videos Chris Harris has posted are helpful for a newb like me. Everything went well until I started cleaning the boot and I found this:

    [​IMG]

    Looks like this is where it came from:

    [​IMG]


    I know this bike was put down pretty hard before I bought it and I've never heard any noises out of the drive shaft...how much should I be worried?
    #58
  19. disston

    disston ShadeTreeExpert

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    some_guy,

    I can't tell what kind of material that is. Is it flaky like paint or is it plastic or rubbery? It doesn't look like metal. Include year and model bike. Because that drive shaft could be a solid or a sprung shaft, I think. What happens with material if broken in your fingers? I'd at least wash the tube and shaft with something to get all of what ever it is off, out of there.

    It looks like paint flakes in the picture. If this is all it is then I'd say somebody painted the swing arm and got a bunch of paint on the inside.
    #59
  20. some_guy

    some_guy Been here awhile

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    It's metal, stuck myself pretty good when I found the first one. Didn't find any other metal chunks or shavings in the gear oil. Everything else was suprisingly clean.


    95 R100RT.
    #60