New to dirty bikes, and recently got a 2006 WR450Fv ...its been into a local shop for some necessary work that I didn't want to do (too cold outside to work on it here). Part of the work/parts was a new battery, which I have found to discharge within a few minutes of running the bike, during a combination of high revs idle with the cold start enrichment engaged, followed by a bit of "warmed engine" condition with enrichment off, then normal idle rpm followed by a few minutes of low rpm riding....grand total of +/10 minutes run time = dead new battery. I charged the bat. and tried again with metering in place and found that at low rpm idle I was in discharge mode with the system supply a lowly 9V .. BUT.at +/-5000rpm I got a reading of 14V.
I would like to know from other WR450 owners, ..is this low rpm discharge a normal condition.. which is the story the shop tech was giving me ? What charge voltage are you seeing at engine idle rpm?.