[spock]

First thing to do is try another battery, preferably a good quality AGM type like Honda puts in the quads when new. I've seen some weird issues with Lithium batteries including one that self destructed - split wide open without warning.

 

[spock]

Sounds like your new battery is defective or there's a pretty major drain in the electrical system. That's pretty rare with Honda quads, are there some aftermarket parts involved or accessories that connect to the 12 volt system?

 

[spock]

The voltage should rise as soon as the engine is started, if not then there's something wrong. The stator should generate power as soon as it's running and the v-reg keeps it from over charging (yes, around 14 volts is normal). You'll have to find what drains the power when not running, with a voltmeter connected you could unplug the components one by one and watch the meter.

 

[spock]

Right, it was the 450 of Kram's that drained the battery while shut off. The battery dying on yours has to be in the charging system if it occurs even with a good battery.