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Type: Posts; User: kitabel

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  1. W/r/t/ "the primary chain can take this much...

    W/r/t/ "the primary chain can take this much misalignment"
    I can't diagnose your problem, but .080" is 5 X too much (I'd settle for 1/64" if I had to), something is wrong
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    Pretty sure it's JIS, I had a 1972 H2 750...

    Pretty sure it's JIS, I had a 1972 H2 750 2-stroke.
    Caution: keep the original front fender if you have it, it directs air to the #2 cylinder.
    Biggest service complaint: fouled plug, especially...
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    378

    It's not technically difficult, it just involves...

    It's not technically difficult, it just involves careful measurement. Once you examine the seats closely, the reasons for the specific work will fall into place naturally, it's almost intuitive.
    The...
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    The insert is larger than the original (1.75")...

    The insert is larger than the original (1.75") seat OD, but the insert placement is not reliably concentric. When cutting the new seat the insert may expose the parent aluminum at one point, so the...
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    891

    I've found embedded glass beads in the surfaces...

    I've found embedded glass beads in the surfaces of carefully cleaned aluminum castings, and in other very bad places (behind races, blind threaded holes, inside oil passages, snap ring grooves,...
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    651

    Oil sounds really good, since the oil level will...

    Oil sounds really good, since the oil level will be a large function of the piston motion, by the ratio of the bore^2 tube^2. If the bore is 3.25" (Chief) and the tube ID is 1" the oil will rise...
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    The difficult thing to do is... when, exactly,...

    The difficult thing to do is... when, exactly, does the piston stop?
    There is probably .0005" each worth of pin and big end clearance that will reverse to hide crank rotation: the piston won't move,...
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    651

    It can find TDC, but (unless you know that the...

    It can find TDC, but (unless you know that the spark plug thread is vertical) don't use it to set spark advance.
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    341

    Replacement lower case, replacement engine...

    Replacement lower case, replacement engine number, both?
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    Sorry, I can't help with the original question,...

    Sorry, I can't help with the original question, but what throttle disc and venturi diameter is the M9?
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    The parts with flats on opposite sides are axle...

    The parts with flats on opposite sides are axle sleeves.
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  13. you'll be sitting on at least a few items before...

    you'll be sitting on at least a few items before they move at top dollar.

    The good stuff will go immediately, and some part of the additional return (over selling it as a bike) will be on your...
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    The question used to be not "can they do good...

    The question used to be not "can they do good work?", but "will they do good work for you?".
    Two different answers way too common.
  15. Only 1937 U, UL cylinders are 3-5/16" bore...

    Only 1937 U, UL cylinders are 3-5/16" bore (3.3125", same as EL) as always for 74" U, UL, but use the 120-37/371 13 fin casting otherwise only found on 1937-41 80" UH, ULH with 3-27/64" bore...
  16. Thread: Oil change

    by kitabel
    Replies
    15
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    1,197

    "W" is not weight, it's winter: the oil viscosity...

    "W" is not weight, it's winter: the oil viscosity when it's cold = 23 F.
    Just a rumor: "The 1st number in the oil viscosity is the time it takes, in seconds, for cold oil to reach everywhere in the...
  17. Thread: 1941 ulh heads

    by kitabel
    Replies
    19
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    1,418

    Early V-Twin heads are easy to identify. Examine...

    Early V-Twin heads are easy to identify.
    Examine the gasket surface - is it flat, smooth, with no imperfections? That's not his.
    His look like the gasket surface was prepared by dragging it across...
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    If there's any wiggle room, the shafts will try...

    If there's any wiggle room, the shafts will try to approach each other, and the belt will march outward in its quest to hide in the grass.
    Pay particular attention to the holes in the frame,...
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    Many belts are thrown by misalignment of the...

    Many belts are thrown by misalignment of the sprocket shaft and transmission mainshaft (which must be parallel).
    The belt guide doesn't prevent this - but slices the belt to pieces as it passes by.
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    Do you have the correct carburetor including...

    Do you have the correct carburetor including venturi and main nozzle?
    Float material?
    Float setting?
    Vacuum leak (throttle shaft)?
    Vacuum leak (manifold, nipples)?
    Spark setting?
    Plug gap?
  21. Thread: 1941 ulh heads

    by kitabel
    Replies
    19
    Views
    1,418

    The ideal static compression ratio is not fixed,...

    The ideal static compression ratio is not fixed, even for a specific engine type. The CR is a balance between cylinder pressure (small chamber volume) and high RPM flow between the intake valve and...
  22. Thread: 1941 ulh heads

    by kitabel
    Replies
    19
    Views
    1,418

    All H-D sidevalve engines have quench, it's just...

    All H-D sidevalve engines have quench, it's just not very effective because of sloppy tolerances and head gasket thickness variations. Some U series as loose as .080" between negative deck clearance...
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    UL - knucklehead: same pattern, same height...

    UL - knucklehead: same pattern, same height difference fronts/rears
    VL - knucklehead/UL: different pattern, same height difference fronts/rears
    Panhead/shovelhead - knucklehead: same pattern,...
  24. Thread: 911

    by kitabel
    Replies
    11
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    1,200

    I was around the corner in lower Manhattan during...

    I was around the corner in lower Manhattan during the Fraunces Tavern bombing (Puerto Rican separatists) in 1975.
    I watched the trial of El Sayyid Nosair (shot Rabbi Kahane) across the street from...
  25. Thread: 911

    by kitabel
    Replies
    11
    Views
    1,200

    What do you think is happening today in Riyadh,...

    What do you think is happening today in Riyadh, Kuwait City, Beirut, the Palestinian Authority, Cairo, Damascus, islamabad?
    Laughter.
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