Question about 1992 Aprilia AF1 125 Futura

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Here is the bone head thing that I did. Dead battery (very surprissed never before) so I hooked up charger waited about 45 min and tried to start it would turn but battery still weak, charged a little longer and the same, weaited a little longer and still not enough juice. ALL THIS TIME I WAS CRANCKING THE STARTER WITH THE CHARGER STILL HOOKED UP. Well the last time something did not feel right and after when I turn the ignition to on with the charger still on my tachometer showed about 5000 rpm, with a bigger charger on it shows 7000 rpm, more amps more rpm's??? Anyway I disconected everything and tried to charge battery out of the bike and I guess battery is fried. But I replaced with new battery and now still will not turn and when turning ignition on the tach needle jumps a little and the starter tries but it will not turn. Any suggestions?? fried the starter? ingiter? where to start troubleshooting? thanks in advance,Are you absolutely POSITIVE (no pun intended) you had the charger hooked-up correctly? I've been working on machinery for close to thirty years now, and recently made this stupid, stupid mistake (first time for everything, I suppose). Luckily, it was on an older vehicle, and the battery was dead (and probably wouldn't take a charge anyway), and had no unswitched-electronics to fry. I only noticed what I'd done when I went to check on it, a few hours later. My first Manager job at a Wal-Mart Automotive, we had a kid replace a battery for a Customer on a late-model Toyota; he used the right size but the wrong handedness of battery (reversed terminals). An extremely costly mistake, virtually every electronic bit (with the exception of the ECU - they're diode-protected, apparently) had to be replaced. Most chargers made in the last few years are smart and will prevent current-flow if you goof. Now that I've sufficiently horrified you, are you also absolutely certain that the NEW battery is charged sufficiently? Is it possible that you have a coincidental-failure of say, a float-valve in the carb (if it's carb'd) and it's filled-up a cylinder with fuel and hydrolocked the engine? Not a lot to go on here, hard to diagnose over the 'Net on these things. Also, we don't know your mechanical-ability, hard to just say check the watzenjammit and see if it's worn outta'-round without hoping you know the exact procedure for checking watzenjammits, and the wear-range allowed from the factory. And, as sezurmama suggested - a Factory Manual for the bike would be quite helpful to you here, I bet,,,

Posted on Nov 10, 2008

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