77 2C question
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  1. #1
    FBM
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    77 2C question

    I recently bought a "restored" 77 Benelli 2c. Very nice cosmetics, paint, wheels ect.... The bike was fitted with a powerdynamo ignition and converted to 12v.
    I'm not sure why the drum brake, I thought a 77 would be disk..... but hey, I like the drum better for looks. Also, the double sided adjusters are on the rear, so thats good.

    So I start to look it over to get it running for spring. The battery was very very dead, so I fitted a new one. There was also a battery tender lead, so I installed that as well. All was good until the tender plug bumped the shock and I saw a spark. WTF???? the bare pin is on the NEG side, no?

    Turns out, the bike is wired POSITIVE EARTH! I've had plenty of brit bike, so that doesn't scare me, it just shocks me that a US shop wired it up this way. I would have assumed NEG earth hadn't the spark happened!

    What possibly could be the advantage of doing this? BTW: checked all the lights and horn, all is working fine. Anyone else have this set up?
    Attached Thumbnails Attached Thumbnails 77 2C question-2crs.jpg   77 2C question-2cls.jpg  

  2. #2
    RUSSBUS
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    Power dynomo

    The power dynomo set us is for negative earth system and is a very simple system, contact them and they will send you the install info.
    Check the ignition key switch I would guess that the original installer got confused there and found that positive earth system was the only way to make it work.
    Speak to a local Auto electrician if the switch confuses you but basically ignore the Benelli wiring diagram and just use it as a simple one way switch when you reterminate and all should be fine.

  3. #3
    FBM
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    UPDATE 5-23 Getting it ready for the road;

    1) New clutch cable fabricated with soldered ends. (Still need that actuator return spring - - going without it for now)
    2) Gearbox oil change: going with Mobil 1 4T for cycles - 10-40 synthetic
    3) Re-routed the throttle cable. It was routed under the triple clamp. Its a little long - will make a new one soon.
    4) Tires inspected and inflated. I prefer 32 front and rear.
    5) All brakes adjusted
    6) All lighting working. EXCEPT: no front brake switch wired in at this time. PO removed it.
    7) Fuel: found a slip of paper under the seat that says: Use 52:1 mix. WTF? not sure I trust this one.

    Fuel at 1/4 tank. No idea what the mix is. I'm going to drain it and start out with a "known" amount.
    I have some Maxima Super M, injector/pre-mix esther based synthetic blend (lots of words there) on hand. I use it in my Yamaha DS6C injected bike.

    What ratio to run?

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  5. #4
    Member
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    Hi,

    You'll probably get a million answers to your question!

    I use 30:1 semi synthetic or 50:1 fully synthetic. Both seem fine.

    Cheers,


    Tony

  6. #5
    Member SPEIRMOOR's Avatar
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    Nice Bike! Where you located?

  7. #6
    FBM
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    Quote Originally Posted by SPEIRMOOR View Post
    Nice Bike! Where you located?
    Central NJ, near Trenton

  8. #7
    Member SPEIRMOOR's Avatar
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    Great I knew I saw that bike before NYC here with a project 2C and no time.

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