HELP!! i have this ongoing problem. After driving for a few hours, the headlights cut off, 20 seconds later the speedometer blanks out, 15 seconds later the motor quits. i have to put it on a trailer, take it home, recharge the battery then it works fine (then this process starts all over again). Bike shop said it was cranking amps and told me i should buy a new battery after they tested the charging system which was ok... with a new battery, the same thing happened. This time i took note of the voltage.
When the new battery died it was about 11.60 volts. I fully charged it to 12.86. Put key in the ignition and the fuel pump (whirling sound) dropped it to 12.34. (High beams are on)while cranking it dropped as low as 11.14, then stayed at 12.18 while slowly dropping. Turn engine off and tried again with low beam lights, 12.18 with whirling noise, dropped to 11.98 while cranking, then stayed at 12.13 while slowly dropping. with the engine still on, i turned the lights from low beam to high beam. low beam-12.13, high beam-12.09, low beam-12.11, high beam-12.06. i turned off engine then it rose to 12.6. after ten minutes it got back up to 12.82.
Note: i do not have turn signals hooked up or speedometer sensor. After the engine dies while driving it, is in the range of 11.60-11.20. I let it set for a ten minutes then try to start it. The speedometer light is bright and whirling noise is normal but wont start (sounds like it dont have enough juice). Then i try it again, the speedometer light is dimmer and the whirling noise is lower. then i try again and nothing happens.
What could be the problem?!?