Yes you can overcharge batteries, and they burst into flames, and very well may burn your house down while you are working..You want a peak detection charger..you can get one as little as $30..It will beep, and then Auto switch to trickle charge when the pack has reached max capacity..you cannot blow up a battery on trickle charge.....
You should not run your clutch bell stripped..It will in turn strip your spur gear, it may also blow out your bearings, ruin your clutch shoes and cause your engine to overheat...