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Thread: New 75/5 and questions

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  1. #1
    sneakers563
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    New 75/5 and questions

    Hi all,
    After months of lurking and scheming, I finally pulled the trigger and bought my first "proper" motorcycle, a '71 75/5. It's been sitting since 2002, so it's going to need a bit of work, but the price was right and I've been looking for a little bit of a project. Needless to say, I'm pretty happy.

    Besides wanting to announce the acquisition of my new baby, I was hoping that the good people here might be able to give me a little bit of advice/help too. The previous owner made a few modifications to the bike over the years (he owned it for 38 years, bought it new when he was 19), and I'm trying to decide which to keep. In general, I lean towards stock except in cases when there's a clear benefit, or reverting to the stock part would be overly expensive. Because this is my first BMW, I'd like to stay fairly close to what's in the Clymer manual.

    So, apart from fairing and seat (which are definitely going), these are the mods that I'd like your thoughts on:
    1) The points have been replaced with a Dyna III electronic conversion kit. This is one that I'm leaning towards keeping, but I do have one question: I'm planning on running compression tests on the cylinders. My Clymer manual says that bikes with electronic ignitions should not be turned over with the spark plugs disconnected. It recommends disconnecting the ignition unit to avoid damaging it. I assume that's the case here as well, but I have no idea what needs to be disconnected. Can anyone look at the picture below and help me out? Would disconnecting the battery be enough?

    2) Something called the "Road Rider Air Fork Kit" was added to the fork. Anyone know anything about this and whether it's worth keeping? As far as I can tell, it's simply some new fork caps, compression fittings and a gauge added to the existing fork to allow additional air damping. The rest of the fork remains more or less the same (oil, etc.), so it should be fairly easy to remove.

    3) The carbs have been swapped for 36mm Mikunis. I haven't found anything that looks like a model number anywhere on the body of the carbs, so I can't confirm the size and I don't know what model. My only real concern with these is that I don't know how to properly balance them. Again, the Clymer manual says not to run the engine with one plug disconnected if you have electronic ignition, and there doesn't seem to be a vacuum port on the carbs. Any tips?

    Thanks, looking forward to any help you all can provide.

    -Steve
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