My 1st Airhead R75/6

Discussion in 'Airheads' started by lake_harley, Jun 9, 2012.

  1. disston

    disston ShadeTreeExpert

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    I am right now half way through cutting the butterfly shaft out of the right carb with a file. I don't have any good hack saw blades. I have a hole saw kit I thought of using but it's much too crude to hold inside the throttle bore and cut the brass plate and shaft with out causing a bunch of collateral damage. The heads of the screws were buggered so I have to cut the dang thing out in two places so it will all come out. I hope to finish this part of this project tonight.

    Going to try running the stock jets Bill.
    #81
  2. Big Bamboo

    Big Bamboo Aircooled & Sunbaked

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    High idle can also be a symptom of a sticking advance unit. One way to check while the bike is idling is to quickly turn the key off and on again without letting the bike stop running. If the idle drops, you know it;s time to remove, clean and grease the inside of the advance unit. Note: it's a very specific grease BMW recommends, available from Capitol Cycle.
    #82
  3. disston

    disston ShadeTreeExpert

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    BigBamboo Brahda,

    Is that the Hawaiian way, turning off the key and turning it back on? By the way I meant to tell you, I'll bet they have a Dyno on Kauai.

    I think Tommy is out of Ft1v4 grease for the points cam. He was a month ago. If you call him and he has any, anybody, let us know.
    #83
  4. lake_harley

    lake_harley Been here awhile

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    All good input and possible causes to the high, warmed up idle. I'll start with the simple things (leaking boots, etc.) after double-checking the carb sync and work my way through as necessary.

    On the advance unit sticking, I don't think that would be the cause on my bike since it advanced and retarded fine when timing with the light yesterday, but I'm not going to rule it out. It would indeed hold the idle up if it's sticking advanced. Easy enough to check with your method. That indeed should shake them loose if sticky.

    Thanks

    Lynn​
    #84
  5. Big Bamboo

    Big Bamboo Aircooled & Sunbaked

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    Actually, I learned that trick from Duane Aushermans website, saves pulling the front cover if you're lazy.... "cough" I mean relaxed and easy going, like me. :D Too bad about the Dyno on Kauai, I can't swim and they killed the inter island ferry system.:cry If you really need the special grease, I can put a dab in a zip lock baggie and mail it to you for the cost of postage.:deal
    #85
  6. disston

    disston ShadeTreeExpert

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    I looked everywhere for points cam grease. There is a Mallory, Chevron and some others. Finally got some at NAPA. The guy had to look it up and order it but they did have it.
    #86
  7. Big Bamboo

    Big Bamboo Aircooled & Sunbaked

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    Points cam grease is for the felt block, the advance unit stuff is a different animal...
    #87
  8. disston

    disston ShadeTreeExpert

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    Yes, you are right. I confused the two. Ft1v26 is the grease for the advance unit. Ft1v4 is the points cam grease. Capital Cycle does have the Ft1v26 in stock, that's were I got mine. They are still out of the Bosch Ft1v4 points cam grease and so is everybody else I checked with except some Porsche place that had it for $20 shipping and handling in addition to the price of ten bucks.

    If you have a NAPA store near you they have an in house thick grease for points cam use. It is an Echlin product and the part # is ML-1.
    #88
  9. lake_harley

    lake_harley Been here awhile

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    I've been busy with a number of things lately and haven't ridden the /6 for a while. I did take some time, a couple weeks ago, to dig into my non-functioning oil pressure light. I had replaced the sending unit, but it once again quit coming on when the ignition was turned on. Turned out to be more loose pin/circuit board conductor strips. I should have just soldered them all when I had it apart the first time! Also checked, lubed, and generally futzed around with my odometer. I haven't ridden the bike since this last odo "service". I thought I had it fixed one time before but sticking gears and such made it add 200+/- miles to the odo total in a 5 to 6 mile ride. Maybe it didn't really have over 100K miles on it when I bought it:lol3. On the first "service", I adjusted the little drive worm gear to make contact again and thought I had it fixed, but things were so tight, the worm gear got pushed out of engagement again. Anyway, things worked much smoother turning it by hand after the second try so we'll have to see how it does on a ride.

    The last time I rode the bike it seemed the engine got "noisier" after the engine had completely warmed up. Not knowing if that is somewhat the nature of an airhead, I decided to re-check the valve clearance. Left side still on the money where I set it last time. The right side was about .001" loose, but I might have had a different "feel" on that side before. Certainly not anything that would cause excessive clattering. It's at spec now. So...the question de jour is simple, do airheads tend to get noisier after they're up to opearating temp? I'll admit, I need to re-sync my carbs since it runs a bit rough at idle, but the noise, when at a fast idle and it's running pretty smoothly, is still there. I wouldn't describe it as a "hammering connecting rod" death knock....more like very loose valves.

    I'd love to get this bike more sorted out so I can justify tinkering with "fun" things like building a solo seat and luggage rack for over the rear fender:D.

    Thanks, in advance, for any feedback regarding normal airhead sounds.

    Lynn
    #89
  10. rufusswan

    rufusswan Been here awhile

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    There've been so many comments lately by those that plug in some sort of music and ignore the 'sounds' .... well I'm surprised some have not weighed in.

    Mine doesn't seem noisy to me, just a nice sewing machine sound. 'Course I can hear if I've mis-adjusted the right exhaust tappet too loosely. I'll bet you though that every one of them is different. Mine doesn't seem as noisy when warmed up, but if I move my head or adjust my helmet in a certain way the leg jug gets loud.

    I'll wager ever damned one of them sounds different. Make sure the valve lash is correct and synch the damned carbs, and ride the thing. You will get better at both of those adjustments. Get to work on the single saddle, I had a ball last winter making mine :D
    #90
  11. lake_harley

    lake_harley Been here awhile

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    Well alrighty then....I'll just ride it and fix it if it breaks.....after syncing the carbs again:D Oddly enough, the left side of mine seems to be the noisier side too.

    I did build a solo seat pan from some 18 Ga. mild steel today. I got tired of "haf-ta-dos" and decided to work on a "wanna-do". I'm not 100% happy with the pan, but I think it'll work. I want to pick up some foam (really firm) from an upholster friend of mine tomorrow. I'd like to do the foam shaping and then have him do the cover. I'll take the seat pan in to let him see it first to make sure he can attach a cover to it.

    Then it's on to a rear rack......

    Thanks

    Lynn
    #91
  12. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    'Tis an endless vista of enjoyment, no? :D

    --Bill
    #92
  13. lake_harley

    lake_harley Been here awhile

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    Just a couple photos of the bare solo seat pan I built. You can't really see it in the photos, but the rear of the seat has a "flare" to help give the seat some shape. Took it to the upholster today. He'll get some foam glued on it and sculpted (hopefully) to my liking. If all is good at that point he'll sew up a cover.

    The bumpers on the bottom are plastic, but I'm going to keep my eyes open for some rubber, "cushy" ones of the same height. The one large pin on the bottom engages with the stock seat latch. The other large one will fit into a large hole on the right, where I'll put a rubber grommet to keep it from moving around, and the tang on the front will fit under the head of a 5MM screw that I put into a hole that was already in the frame's backbone tube. The pan is contoured to seal against the tool tray weatherstrip. It's not the prettiest thing I've ever built, but once it's covered who's gonna see it?

    [​IMG]

    [​IMG]

    Should get the "pad added" version back next week to have a test sit. If everything's OK the cover will go on.

    Lynn
    #93
  14. lake_harley

    lake_harley Been here awhile

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    I also posted this to the "solo seat" thread in the airhead forum, but thought I'd also add it to my on-going /6 ownership and personalization thread.

    Here's the finished version of my solo seat attempt. Not quite 100% what I envisioned, but I think I can live with it. Next up is a luggage rack to extend over the rear fender.

    [​IMG]

    Lynn
    #94