Slash 2

Discussion in 'Airheads' started by danedg, Mar 22, 2010.

  1. danedg

    danedg Horizontally Opposed

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    The purpose was to post as many words about /2's as possible,
    but each pitcher is worth a thousand words...
    So a pic/day might fill the bill...


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  2. danedg

    danedg Horizontally Opposed

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    Behold! The halogen 35w bulb that replaces the OEM incandescent 35w.
    Both use the standard BA20D base. So you just swap one for the other.

    [​IMG]

    Don't touch the bulb with your greasy fingers!!!

    No one could tell me how much brighter it actually was, but a little research shows that on a lumens per watt basis, a halogen bulb will double the lumens of a comparable incandescent device.
    It's twice as efficient/watt.
    It's %100 brighter than it's predecessor...
    It's like holding TWO candles in front of the bike at night instead of just one.:D
  3. danedg

    danedg Horizontally Opposed

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    [​IMG]

    Before.
    Let's face it, when you change your transmission oil, you pull the tranny plug, and EVERYTHING spooges out over the crossover pipe!:puke1

    It's a fact of /2 life and death.

    But, it can be cleaned once every 46 years!
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    All it takes is ELBOW GREASE!!! And a brass wire wheel on your drill press to cut through the burned on 90W... and WHIZ metal polish...

    Here you can see the handmade header configuration. The chromed nut was installed and then the pipe was flared.


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    I saw the crossover pipe for sale on fleabay, complete with the 2 clamps!
    There ain't no clamps at all to fit the exhaust. Just hangers.
  4. gertiektn

    gertiektn KetchikanBeemer

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    Hey,, Bruce is my best friend.

    Jim, KtN.

    Attached Files:

  5. Beamer Bum

    Beamer Bum Been here awhile

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    I just re-lined my brake shoes and for the first time I have semi-metallic linings. I'm sure they will brake better than the fiber linings I've always had. But, does anyone know how much wear they will inflict on the drum surface?
  6. danedg

    danedg Horizontally Opposed

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    Is that the stuff Benchmark sells?
  7. danedg

    danedg Horizontally Opposed

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    I adjusted my /2 R60 valves last nite.
    Probably for the first time in 8 - 9000 miles.
    In the first 10K after rebuild, I checked 'em every 500 - 1000m, and gave up after 12K, cause they hadn't budged.
    Didn't check 'em at all last year. Another 8000 miles. Bike ran fine. There is one little tap, however.
    So, being completely bored, I pulled covers yester, and whipped out the feelers. Guess what?
    Dead on, both sides.
    Then I reread Elaine's Tech Article on setting valves
    I'd been doing right all along, but didn't realize that a push rod could be bent...and that might be the source of the unidentified tappety tap...
    How badly could the rod be bent and still operate? And if it IS bent, how long will it continue to operate in that condition?
    Another 68,000 miles?:freaky

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  8. danedg

    danedg Horizontally Opposed

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    Just because it's frikkin' SNOWING!!!!!!:huh

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  9. danedg

    danedg Horizontally Opposed

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    A common malady on kickstart /2's, is the first tooth on the segmented kickstart gear {the pawl}, often suffers a fatal injury and is broken off...
    My kickstarter is no exception. I have to carefully feather the clutch, to engage the pawl to the internal idler gear at JUST the right spot, and THEN kick.
    When MAX rebuilt the tranny I was given the option of replacing the segmented gear ($500), or not, with a new one. That piece alone was as costly as the entire refresherment of the tranny itself. At the time, the decision was made to not address the issue. I'll live with it....just like the other shortcomings of my existence.:freaky
    Today, I get a phone call from the OTHER mentor of my /2 experience, saying that a method has been perfected that restores/repairs the first tooth of the pawl. Not only is the segment gear tooth repaired, but the idler gear is refreshed as well.
    Hmmmmmm......
    If you've got kikstart issues, maybe I could get it rebuilt for you.
    This was discussed for several years, and was finally accomplished.
  10. Beamer Bum

    Beamer Bum Been here awhile

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    I believe Dan at Cycleworks does kickstart segment repairs. He also does crankshaft and camshaft repairs.
    http://www.cycleworks.net/
  11. Beamer Bum

    Beamer Bum Been here awhile

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    Yeah, I got from Vech. I think he gets them from Mark Huggett in Switzerland.
    With the old linings I've never had to get the drum cut. I'm concerned the semi-metallic linings will mean I have to cut the drums next brake job. A couple of cuts and I'll need to buy a new hub and lace the wheel.
  12. danedg

    danedg Horizontally Opposed

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    I asked Vech about getting the drums cut. His response was, it's not really possible. If you increase the radius of the drums, the shoes won't match up, and your braking efficiency decreases.
  13. datchew

    datchew Don't buy from Brad

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    :lol3 :oscar:jack
  14. Carl

    Carl ,,,

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    Not is it only possible, I've done it and so have many others. There's too much hearsay and second hand smoke clouding the air on these BMW pre-70 technical items.

    The key is to fully review the hub and its brake liner to determine how and what needs to be machined. Then, and only then should the machining begin in either a brake or engine type lathe.

    Carl
  15. danedg

    danedg Horizontally Opposed

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    What?:dunno
  16. datchew

    datchew Don't buy from Brad

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    Sorry brother. I'm very bad about not thinking about how some of my posts come across at the other end.
    I wasn't laughing at you, but more at what Vech told you.
    It just doesn't make sense.

    Yes, if you shave off huge amounts from the drum, you affect the circumferential position of brake shoe engagement (clock position of where the shoe touches the drum) but you would have to remove alot of metal before it became a serious concern.

    In extreme cases of turning the drum you simply begin to lose some % of the pad engagement surface area, but this doesn't mean you can't turn the drums.

    Single leading shoe and twin leading shoe designs all have a history of being successfully turned and still working quite well. I don't know which is more prone to symptoms from drum turning, but that certainly doesn't mean that the answer is "you can't do it."
  17. crazydrummerdude

    crazydrummerdude Wacky Bongo Boy

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    Especially considering I turn my trucks drums. It's the same theory in that regard. Is there something else we're missing, to justify Vech's answer?
  18. Carl

    Carl ,,,

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    As previously clearly stated, it can and has been done successfully many times.

    There are definitely several concerns to remember so as to not botch the task for those competent to do the hub liner machining. One is to machine the contact surface in a mode that allows it to remain concentric to the steel bearing retainer hub. This tends to be more of an issue w/ '70 and up rear hubs. The tension of the spokes can change the shape of the liner.

    Another issue with the 55-69 twin hubs is the 30204 bearing race journal ID. Between sidecar use and improper PM, the bearings races are often, or become, loose in the hub. This can also be fixed, yet if brake lathe cones are used w/ the bearings races that have a loose fit for the machining task the brake liner can be improperly machined.

    Carl
  19. danedg

    danedg Horizontally Opposed

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    I believe your first attempt at an emergency stop, will justify Vech's response.
  20. Carl

    Carl ,,,

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    Your response is both 'Horizontally Suppressed' and 'Horizontally Oppressed'.

    Not everyone is a kool-aid drinker.

    Carl