Anyone in Melbourne got a chain-breaker?

Discussion in 'Australian Motorcycles' started by Loz, May 30, 2005.

  1. Loz

    Loz Guest

    I've got new chain and sprockets to fit to the CB900 Hornet. I'm
    interested in doing it myself rather than taking it to a mechanic, just
    so I can see how things work in there a bit better. I don't, however,
    have a chain breaking tool or any experience with this sort of thing,
    so...

    If any of you Melbiourne guys have the gear, a bit of time and the
    inclination, I'd be happy to bring around a slab one night or weekend
    if you could help me sort it out. Sooner's better, the old chain is
    knackered good and proper and about to start dragging on the bloody
    centrestand (poor maintenance by previous owner).

    Of course, if this is better done by a qualified mechanic, let me know.

    Cheers
    Loz
     
    Loz, May 30, 2005
    #1
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  2. Loz

    glitch1 Guest

    You anywhere near the Outer Eastern Subs?

    cheers
    pete
     
    glitch1, May 30, 2005
    #2
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  3. Loz

    FuTAnT Guest

    If no one has one, I picked up an Emgo chain breaker/riveter for $65 the
    other day. Looks pretty much exactly the same as the Motion Pro ones, except
    without the price tag. It'l break all chains as well as cam chains (my
    intended purpose for the time being).

    Cam
     
    FuTAnT, May 30, 2005
    #3
  4. Loz

    Loz Guest

    Hey, it's all Melbourne, right? I can get out there no probs.
    :)
     
    Loz, May 30, 2005
    #4
  5. Loz

    John Guest

    Yeps loz, for breaking a rooted chain... a 100mm angle grinder is your
    friend~~

    Johno

    You need a beer first tho....
     
    John, May 30, 2005
    #5
  6. Loz

    John Guest

    no mate....


    Johno
     
    John, May 30, 2005
    #6
  7. Loz

    John Guest

    No bloody good for the vfr cam chain tho.... ;(


    Johno


    Beer cam?
     
    John, May 30, 2005
    #7
  8. Loz

    Loz Guest

    Yeps loz, for breaking a rooted chain... a 100mm angle grinder is your
    Yeah mate, but I think I need a proper tool for shortening the new
    chain and putting it all back together... Or perhaps I'm showing my
    ignorance. Wouldn't be the first time. Wouldn't be the first time this
    week, even!
     
    Loz, May 30, 2005
    #8
  9. Loz

    Marty H Guest


    grinder will work for that to!! just shave of the rivets

    I had a chain braker...but I broke it, but the riveter still works

    Marty H
     
    Marty H, May 30, 2005
    #9
  10. Loz

    Vincent Guest


    You should be able to pick one up from Sprockets Australia in Yarraville
    Otherwise, you can use an angle grinder to take it apart and a hammer and
    punch to rivet it back together again
    this method has been tried on numerous occasions on track days with great
    success, although power could be a problem at the track, you can always use
    a cold chisel, the rivets are only soft copper
     
    Vincent, May 31, 2005
    #10
  11. Loz

    c.dean Guest

    For Sure.
    Chain breakers, excepting extrordinarily expensive ones, have a habit
    of destroying themselves.
    A carefully wielded angle-grinder is the best tool for the job. To
    install the clip-link if it is tight (as it should be), use a G-clamp
    and few pieces of square bar or allen keys to press the sideplate onto
    the clip pins. Use a blade to make sure the clip has engaged properly.
    Ask your friendly spare parts person how many links you will need to
    cut off your chain (assuming you are running standard gearing they will
    be able to look it up). If you are particularly nice about it, they may
    even take it out back and cut it to size.
     
    c.dean, May 31, 2005
    #11
  12. Loz

    Loz Guest

    I'm actually going to a 1-up on the front, 3 down at the rear gearing.
    I wonder how much this will affect the chain length? Perhaps I'll just
    have to play it by ear a bit.
     
    Loz, May 31, 2005
    #12
  13. So wheredidyageddit?

    big
     
    Iain Chalmers, May 31, 2005
    #13
  14. Loz

    c.dean Guest

    Any good moto store will be able to order one in.
     
    c.dean, May 31, 2005
    #14
  15. Loz

    c.dean Guest

    I have made up a formula to calculate chain length based on sprocket
    sizes, pitch and centre distance but the easiest way is just to start
    somewhere aroundabout the smallest adjustable centredistance (important
    for chain slack adjustment later on) and cut the chain to size 'on' the
    bike.
    If anyone wants the equation I'll type it up and post it. Quite easy to
    derive though.
    I've got it implemented in Excel somewhere too..
     
    c.dean, May 31, 2005
    #15
  16. Loz

    John Littler Guest

    At Lowes ?
     
    John Littler, May 31, 2005
    #16
  17. Loz

    Loz Guest

    Yeah, that'd be nice. Link the .xls too if you can be bothered...
    Cheers
    Loz
     
    Loz, Jun 1, 2005
    #17
  18. Loz

    Chris Guest

    OK.

    Rf = Radius of Front sprocket in mm (measured to 'chain' centreline)
    Rr = .... REAR Spkt "
    ß = 'An Angle' IN RADIANS!!!
    D = Centre Distance (mm) between the sprocket axes.
    Pi() = Pi =~ 3.141592654
    Lp = Chain centreline path length
    LINKs = Chain length in links

    ^X Denotes "To the power of X"
    Note that ^0.5 means "The square root of".


    To calculate Your Sprocket Radii:

    'Chain Centreline' Radius = [(Number of teeth)*(Pitch in mm)]/[2*Pi()]

    For a 520 chain, the pitch is 5/8in. For a 428 chain, the pitch is
    4/8in. For a
    630 chain, the pitch is 6/8in. For a 530 Chain, the pitch is still
    5/8in. Get the picture??
    5/8in = 15.875mm = the pitch of a 520 chain in mm.

    Now.

    ß = arcsin[(Rr-Rf)/D] IN RADIANS!!!!!!!


    Now plug everything into this sucker

    Lp = Rf*(Pi()-2ß) + Rr*(Pi()+2ß) + 2*(D^2 - [Rr-Rf]^2)^0.5

    ....probably not in its simplest form but it works and a mathematician i
    am not!!
    If you are and can simplify it, please repost it simplified!

    Now to convert this number (Chain path length in mm) into number of
    links, divide by the pitch length of the chain in mm.

    NOTE:
    It's accurate in my experience to about +/-5mm (chain length). This is
    attributable to inaccuracies in the measurements made and manufacturing

    tolerance of the chain and sprockets. If you are a shitty measurer it
    will be a lot worse. It will be thrown out of whack if a chain roller
    is used (ie some dirtbikes). I have another equation for that one.
    Note also that the centre distance changes during rear suspension
    travel.

    Easy enough to plug into excel, and I don't have anywhere to host the
    file.
    I'll email it to you if you like.


    Chris

    Spada Deluxe
     
    Chris, Jun 1, 2005
    #18
  19. Loz

    GB Guest

    With pleasure:


    $p = "(02) 9439 3549"; # number of local Yamaha dealer
    $s = "Bob"; # spare parts guy at local Yamaha dealer
    $q = "What size chain do I need for my 1996 YZF1000RF?"; #question for Bob

    $chain_size = ($p * ($s + $q));


    Happy to help.

    GB
     
    GB, Jun 1, 2005
    #19
  20. Loz

    Loz Guest

    Perhaps "What size chain do I need if I bugger around with my sprocket
    sizes"

    ....ya clown.

    Thanks chris.
     
    Loz, Jun 2, 2005
    #20
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