Need quick help regarding /5 flywheel bolts

Discussion in 'Airheads' started by backdrifter, Dec 9, 2012.

  1. backdrifter

    backdrifter Wannabe rider

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    Hello all,

    I'm replacing the clutch and rear main seal on my '73 R60/5 today. So far it's gone pretty well - one stripped clutch bolt, but I finally got it out. And yes, I blocked the crank! :D

    Here's the problem, once I got the flywheel bolts out, I noticed that the replacment bolts I bought are different:

    [​IMG]

    The old one is on the right, new one on the left. I'm surprised, because I bought these from a great local resource - an airhead guru that really knows his stuff. I've read there were some changes to the flywheel/clutch assembly through the years. Mine has the small spacers between the pressure plate and the pressure ring.

    So my question - is there any way I can use the new bolts or do I need to return them for the correct ones?

    I was hoping to get this whole job done today, but if I can't, I can't.

    Last question - any tips on getting the flywheel off? Seems stuck pretty good, even though the bolts have been removed.

    Thanks!
    #1
  2. disston

    disston ShadeTreeExpert

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    According to the info I have the shorter, 24mm, 10mm bolts are all of /5. The longer ones,32mm, 10mm are until Sept. 1975. If the longer ones fit you can use them but I wouldn't try to drill and tap to do that. I think some of the later /5es might take them but not sure at all.

    I have a really old puller that I use for the flywheel. I think some with out a puller are stuck with kinda rockin' it off. Take your time. Don't force it.
    #2
  3. craydds

    craydds Long timer

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    I am right in the middle of the same chore - new rear main seal, oil pump seal, and new clutch, too. Got my transmission out today; going to call it quits for now. Backdrifter, you do not have to use new flywheel bolts. While it may be a good idea to use new ones, it is optional. If you can't find the correct bolts you can re-use the old ones.
    #3
  4. backdrifter

    backdrifter Wannabe rider

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    craydds - thanks for the info. That's interesting, you're the first I've heard say that the /5 flywheel bolts can be reused. Either way, I've come this far and I'm not going to get anxious over or cheap out on flywheel bolts. I tried screwing them in, and they're too long and won't seat where they need to, so I'll return them and swap them for the right ones.

    disston - thanks for the help as well. I ended up going this route to remove the flywheel, and it worked pretty well.

    Thanks gents!

    [​IMG]
    #4
  5. Max Headroom

    Max Headroom lost in the '70s

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    I'd debate the wisdom of re-using 10mm flywheel bolts.

    Unlike the later 11mm flywheel bolts, the 10mm bolts as fitted to the /5 and the first two years of the /6 are designed to stretch.

    YMMV etc.
    #5
  6. backdrifter

    backdrifter Wannabe rider

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    Thanks, Max. Even if they were reusable I wouldn't reuse them. I'm going all out with the hopes of never having to get this far into the engine of this bike again in my lifetime!
    #6
  7. craydds

    craydds Long timer

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    I stand corrected. I reviewed some information that said to REPLACE the old 10 mm bolts with NEW bolts. It is the 11 mm bolts that can be re-used. Don't remember where I read that one could re-use the 10 mm bolts, but I will find the source and proceed to taunt them.
    #7
  8. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    The bolts with the "neck" between the threads and the head are stretch bolts and and must not be reused.

    Good move. Pass their name along and we will taunt them a second time... :D (not really)

    --Bill
    #8
  9. backdrifter

    backdrifter Wannabe rider

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    Gotta love a good Monty Python reference! :D
    #9
  10. disston

    disston ShadeTreeExpert

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    Make them walk the plank!

    That's what they do to me when I say something stupid.

    :lol3
    #10