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Thread: v45 magna

  1. #1
    Newbie
    My Bike(s)
    1984 v45 magna 750
    Location
    Pukekohe East, New Zealand, New Zealand
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    2

    v45 magna

    hi all,have just brought a 1984 750 magna,took it for a ride,its gutless,very down on power,guy i gt it from said carbs needed tuning,could this be the reason it is dwn on power,also idles rough,any ideas,cheers

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  3. #2
    M-J Lifetime Achievement Award
    My Bike(s)
    '10 Kaw Vulcan 900 Custom
    Location
    Ocala, FL
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    8,539
    Quote Originally Posted by aruhsv View Post
    hi all,have just brought a 1984 750 magna,took it for a ride,its gutless,very down on power,
    Those occurances are out of order. You ride FIRST, BEFORE you exchange money. SIGH.

    You don't "tune" carbs. He is blowing smoke up your backside........and laughing all the way to the bank.

    It could be a LOT of things causing it......probably one of the cylinders not firing right.......and a lot of different things can cause that.

    You need a good bike mechanic.

  4. #3
    Just Won't Go Away !
    My Bike(s)
    several
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    Buford, GA
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    5,197
    It is quite possible that a carb cleaning, adjustment, and rebuild will make this bike run like new. It is also just as likely that the problem is something else, up to and including the motor needs a complete rebuild and you bought a lemon. Does the bike smoke at all? Is there any residue inside the exhaust pipes?

    The best way to start is to see if you are getting spark to all cylinders. If not, take it to a shop. If you are, clean the air cleaners, drain out the old gas if you do not know when it was purchased, dump a can of carb cleaner into the tank, fill with fresh gas, run it until the treated gas gets to the carbs, then let it sit overnight. Take it for a run the next day and see if anything is better. If it is a bit better, pull the carbs, clean and rebuild them. If not, take it to a shop and see what they say, as it could be any number of things, from an air leak in the intake system, to a bad ignition modual, to a bad plug to a bad coil, toa bad plug wire, to bad rings, to bad valves, to a burnt piston. Paying a shop for an hour of diagnostic to see what is wrong is a lot cheaper than buying parts to chase down everything it might be.
    You MUST obey the pug dog!



 

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