Clutch Bolts

Discussion in 'Airheads' started by Voltaire, Apr 23, 2012.

  1. PaulRS

    PaulRS Dutch fool

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    For racing duty, I'd cut the bolts so that 1-1/2 to 2 threads stick out the other end and give it a drop of heavy-duty thread lock, see the Loctite site.

    Forget the washers.

    Paul.
    #21
  2. Voltaire

    Voltaire Titanium and Ceramic Hipster

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    Thats cool,:D I'm all for experimenting on a bike that has been built up of bits from all over.
    So far experimented with:
    DIY second front disc mount made by modifying a RH one.
    DIY engine lift bars.
    Brembo handle bar M/C with SS hoses and ATE brakes...works very well.
    36mm stubs on an R90 head
    Racetech fork mods, Brembo fork internals in an ATE set of lowers.
    later clutch on early crank
    Ducati carbs
    and so on.....

    Next I have an Ignitech programmable igniton to tinker with :clap
    I'm now looking for a better torque wrench though....1/4" drive"...?:ear
    #22
  3. supershaft

    supershaft because I can

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    Experimenting? No need to so far. My advise is to run what is known to work on your clutch and spend your time on more important lap time reducing mods like jetting, ignition timing, suspension, etc.. I hope you noticed that PaulRS was saying what he "would" do, not what he has done. No washers might work fine but I haven't had the need or the time to find out since washers installed correctly work perfectly whether they are being raced or not. It might be a good way to ruin a weekend and spend a lot of money that could be better spent on other things. If a bunch of people jump in and say they have been running no washers with no problems that is one thing but . . . . Just trying to help! :D

    Better wrench? You just need a different one. You need three or four different range torque wrenches to use them correctly on airheads.
    #23
  4. Voltaire

    Voltaire Titanium and Ceramic Hipster

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    :rofl
    #24
  5. supershaft

    supershaft because I can

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    Hey now! :lol3 I am just trying to help. :D That does make sense if you think about it. I have never had any trouble with them once I get them installed correctly and I have installed tons of them on all sorts of BMW models. All the later longitudinal crank models use them and they normally cause no issues IF you mind putting them in right. :freaky
    #25
  6. DoktorT

    DoktorT BigBrowedNeandereer

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    If you want tons of heresay, do as super says. If you want results, stick to specs. Your choice.
    #26
  7. pommie john

    pommie john Long timer

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    Isn't that exactly what Supershaft is suggesting? Sticking to specs?
    #27
  8. Crisis management

    Crisis management Latte riders FTW!

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    You can borrow mine, it's metric but I'm sure you've got enough computing power to work out the conversion. (KTM's have very low torque settings too!)
    #28
  9. supershaft

    supershaft because I can

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    Thanks pj. You are correct. Sometimes I can't figure out how he gets what he does out of what I write.
    #29
  10. Voltaire

    Voltaire Titanium and Ceramic Hipster

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    Did a bit of a search on " star washers"
    the general opinion seems to be along the lines of:

    Having visited the factory in Spandau once I'd guess they are used more for fast and easy assembly than good engineering practice.
    Any non shade tree engineers have an opinion on these?
    #30
  11. supershaft

    supershaft because I can

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    Man! You visited the factory! Why didn't you say so! :lol3

    Shade tree engineer? :eek1 That hurts! And I am just trying to help. :D Well I have never . . . . wait a minute, I actually have over and over again. :rofl Go figure. But others are reading too!

    From my dad to tons of other BMW certified techs that I have worked with which, of course, includes myself, I have not heard of any problems with them other than what I have already mentioned. No bulletins from BMW either that I am aware of. They come on models that make way more power with the exact same basic design. They just don't handle being installed incorrectly.

    Star washers and split washers aren't used much if at all in aviation for stress risers. They don't cause any in this situation from my sampling. I don't think you have to worry about the cover plate cracking.
    #31
  12. disston

    disston ShadeTreeExpert

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    Just because you have been to the factory gives you the right to put down Shade Tree Mechanics? :puke1
    #32
  13. Voltaire

    Voltaire Titanium and Ceramic Hipster

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    :huh I thought I had made an observation on high speed production lines needing to use inferior methods of fixing components together by assembly line staff, and wondered if a mechanical engineer might care to comment.
    I also visited lots of breweries but make very average beer.:rofl
    anyway time to pack up bike and go racing :clap
    #33
  14. disston

    disston ShadeTreeExpert

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    Have a nice trip. Happy racing.

    charlie
    #34
  15. Voltaire

    Voltaire Titanium and Ceramic Hipster

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    Thanks Charlie, great weekend of racing. I'd never been to this track so it was all new to me, My team mate on his Triumph and I took it easy as quite a few bikes were binned on lap one due to cold tyres.....a Manx Norton...and a green frame Ducati 750 to name two.

    [​IMG]
    My teammate on his Flat Tracker 750.
    [​IMG]
    Tasty Kiwi fare....greasy chips, deep fried battered sausage on a stick with tomato sauce.....yum:huh
    [​IMG]
    BMW holding up despite lots of non spec parts.:clap
    [​IMG]
    Most successful airhead in New Zealand, we swapped bikes for a practice session and his comments were " turns nice, lots of grunt out of corners, great first build and wait for it ......brakes are good......they can't be I said...the internet says so...:lol3
    His went well with its twin plugs, reangled intakes, 40mm dells..etc....dunno about the Brembos...they were ok....:evil
    #35
  16. Padmei

    Padmei enamoured

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    Tu meke bro:clap
    Wow that's a great recommendation from Kane. Is this your first time racing or have you done a bit of it before?
    #36
  17. Voltaire

    Voltaire Titanium and Ceramic Hipster

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    Did two levels of the CSS late last year, couple of track days on the Thruxton, built up the BMW over Xmas and first race was a Puke in Jan, then HD in Feb now Taupo.
    Maybe he was just being nice....He did say he was tempted to pass me.... I wish he had as it would have been cool to be passed by a bike I built up from parts I bought on Trade Me and Ebay.:clap cheers John
    #37