Anyone try a li-ion or lipo battery in their new valk? I'm getting some weak starts lately and figure this Yuasa battery's about to go. I ride everyday so it's not from sitting. I also wonder if my alternator is overcharging the battery. My multimeter says it's about 13.5 volts, and after I start, the voltage reads about 14.2 at idle. This battery is slightly under 2 years old so I'm getting a bit annoyed.