Just bought a 87´ Venture 1300. Drove it home 40 miles without as much as a burp. Got home and the battery icon was on. The manual said that the battery is low on water, so I proceded to fill all cells (all were less than half full). put trickle charger on overnight, battery icon went off. Bike started up, popped, backfires, no power, and even the tach revs \\