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  1. Replies
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    2,209

    The Transpo IB301 is what I've been using for...

    The Transpo IB301 is what I've been using for years. It doesn't have the pigtail, just plain male terminals on the bottom of the epoxy-sealed case.

    The adjustable unit is the IB301A....and they're...
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    2,209

    :brow Skip the adjustable regulator. It's more...

    :brow
    Skip the adjustable regulator. It's more trouble than it's worth. Accurately adjusting them is a great deal more difficult than you might expect; the final voltage varies with load,...
  3. Quote: "I am confused as to the cause. I have...

    Quote: "I am confused as to the cause. I have heard that both too lean and too rich can cause the condition. Both explanations seem plausible."



    :type

    Both are true, under varying...
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    927

    I suspect a bit of crud has found its way into...

    I suspect a bit of crud has found its way into one of your pilot jets- the smallest brass screw inside the float chamber. Pull the jet, examine and clear it, and replace it. Use a new o-ring with a...
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    2,209

    :brow Nice bike! 75/7s are a rare bird- not many...

    :brow Nice bike! 75/7s are a rare bird- not many were made before they punched it out to 800cc.

    If your gen light stays on all the time, even with the key off, you're probably looking at a diode...
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    892

    This would be a good time to make some new...

    This would be a good time to make some new friends at your local Airheads chapter!

    Wobbles can start in several places; your new short bars make it harder to control, but aren't the cause.
    ...
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    646

    Looks like it might be part of an accessory...

    Looks like it might be part of an accessory charger connection?

    :dunno

    Loose wires on a "previously owned" bike are generally suspicious- I'd be inclined to track it down and either make it...
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    Does it leak?

    Does it leak?
  9. Replies
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    2,413

    Hill Machine Headworks 615 NW 45th St Seattle,...

    Hill Machine Headworks
    615 NW 45th St
    Seattle, WA 98107

    (206) 784-9165

    Dan rebuilt many heads for me, outstanding work at a good price.

    Tell him I said hi! :wave
  10. Replies
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    3,133

    Don't put so much oil in it. Seriously-...

    Don't put so much oil in it.

    Seriously- airheads will typically use oil much faster down to a certain level, then slow or stop using any. Watch your oil level; when it stops falling, mark it, and...
  11. Replies
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    Did you mention mileage on this engine? You...

    Did you mention mileage on this engine?

    You could probably never see camshaft wobble from a bent shaft- too small. you need a dial indicator. A timing light is the easiest way to check this.
    What...
  12. Replies
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    2,850

    Not mufflers- he says it cleans up at anything...

    Not mufflers- he says it cleans up at anything but idle. This points towards poor valve seal or bad idle circuit in the carb. Whatever you're looking for appears to go away at speed-

    Unlikely to...
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    874

    :banghead That's right. That'd make it kinda...

    :banghead

    That's right. That'd make it kinda crowded under there!

    The truth is the points in a can is pretty fool proof- unless you get water intrusion or a bad condensor, points can last next...
  14. Replies
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    874

    Chuck the points-in-a-can. Find a good used '81...

    Chuck the points-in-a-can. Find a good used '81 or later solid state set-up, it's a bolt-on swap. Set and forget- you can eliminate the Dyna booster, maybe recoup some of your cost by selling these....
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    552

    Quite right. The gas tank is the greatest risk...

    Quite right. The gas tank is the greatest risk around the steering head; make sure it's not too full to be carefully lifted out of the way before you start, or cover it with a mover's blanket and...
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    Happich Semichrome Polish, I think- great stuff...

    Happich Semichrome Polish, I think- great stuff for the old aluminum turn signals.

    Used sparingly with a toothbrush, it can clean up engine cases with fair success too.

    I've used it on blued...
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    Earlier R90 barrels/pistons will swap right in,...

    Earlier R90 barrels/pistons will swap right in, if you find some good ones. The spigot size was the same til the latter part of '76, preparing for the new R100 bore.

    What does an R90 do on an R75...
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    :wave You're switching to boots, right? If you...

    :wave

    You're switching to boots, right? If you do the job right, there's no need for the felt wipers with boots.

    BMW boots are not vented; there is no hole in the boot for it to breath through...
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    Nope. You're not likely to get any bad tips...

    Nope.

    You're not likely to get any bad tips from Tom Cutter- 30 or so years ago, when I was going to BMW service school in New Jersey, Tom was gracious enough to invite me to stay at his place in...
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    Honed, but not re-bored this time? And the rings...

    Honed, but not re-bored this time? And the rings never seated after the over-size? Were they BMW rings, and are the rings you're installing BMW rings?

    How were the cylinders 'honed'?

    Cylinders...
  21. Replies
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    Did you re-ring this engine? Why was the top end...

    Did you re-ring this engine? Why was the top end off?

    Reason I asked the year; In order to seat the hard-chrome top ring in a pre-nikasil iron-sleeved cylinder, you must keep lubrication away from...
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    What year is your airhead engine?

    What year is your airhead engine?
  23. Replies
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    Sounds like a typical Wherle regulator. Check the...

    Sounds like a typical Wherle regulator. Check the charging voltage with a fully-charged battery and good meter- Wherle solid-state regulators like your R65 probably has seem to cut out at around...
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    Nature of the beast. Combination of single-wall...

    Nature of the beast. Combination of single-wall headers, narrow exhaust valve contact area, and leftover fire let out when the valve opens. I've seen some guys have pretty good success keeping the...
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    Just a thought....you ARE doing this adjustment...

    Just a thought....you ARE doing this adjustment with the bike on the centerstand, right?

    :stick
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