i recently put a new harley battery in my bike, it has been cranking just fine, i came out 2 nights ago to crank it and it just clicked like a dead battery would do, but i turned it off and back on and it fired right up no prob. tried it again and all it would do is click again, so i check all connections on battery, there tight and clean, checked the starter ,the 2 red wires were tight aswell, the white clip that clips into the starter ( its a green wire), i un plugged it and reconnected and now it cranks right up every time?? what is the white clip and its function?? i had it in my hand and reached up with the other hand to turn key on and it sent electricity through me, not a lot but all the same , Ps - also when the bikes cranked the voltage on battery is showing 12.50 volts but when i rev engine it drops a little but goes back around 12.50 volts again, like its fluctuating or something? any ideas?