My 310 seems to have developed some sort of fairly high resistance short in the electrical system. I noticed a few months back that it was getting sluggish on cold starts, figured it was the battery. After it sat for a bit it could barely turn over though lights and pump were fine. Kicked or bumped it, no problem. Trickle charge on the battery, next day no problem. A week later, same thing, barely turned on the lights but not enough juice to crank, bump started just fine. No big deal, I figured the battery just was not holding a charge, bike batteries never seem to last more than a few seasons for me anyhow.
So last week I swapped to a LiFePO4 (Shorai). Worked great straight out of the box. I've gone for several short rides since I put it in, checked the voltage on the battery after I got home, every time it appeared good, around 14V give or take. Out of curiousity I thought I'd monitor the voltage for a bit, since the Shorai's are supposed to hold a charge really well. When I parked it 2 days ago it was just over 14V. Yesterday was 13.8V. Today 13.5V. WTF?
I put an ammeter in series on the positive lead and with no key in the ignition, it's showing about 0.3mA draw. Tried the same on the ground side, same result. Ammeter seems to be working fine, reads down to 0 reliably, and -0.3mA when leads reversed, so this isn't just a measurement error. I have a JD FI controller installed, but even with the ground lead on that disconnected, I still see the 0.3mA draw. But unfortunately it doesn't seem to be a straight resistive short in the system. 12V/0.3mA = ~40kohm. But if I pull the battery completely and measure resistance from power to ground leads, its open circuit, well above Mohms anyhow. A few careful checks also showed a bit of a spike in current to several mA when I first connect the ammeter, which quickly drops to a consistent 0.3mA after a few seconds.
Anybody seen anything like this before? Suggestions where to start poking/disconnecting/measuring? I really don't want to kill another battery, but disconnecting a lead every time I get home is going to get annoying very fast...
Thx!
KF
So last week I swapped to a LiFePO4 (Shorai). Worked great straight out of the box. I've gone for several short rides since I put it in, checked the voltage on the battery after I got home, every time it appeared good, around 14V give or take. Out of curiousity I thought I'd monitor the voltage for a bit, since the Shorai's are supposed to hold a charge really well. When I parked it 2 days ago it was just over 14V. Yesterday was 13.8V. Today 13.5V. WTF?
I put an ammeter in series on the positive lead and with no key in the ignition, it's showing about 0.3mA draw. Tried the same on the ground side, same result. Ammeter seems to be working fine, reads down to 0 reliably, and -0.3mA when leads reversed, so this isn't just a measurement error. I have a JD FI controller installed, but even with the ground lead on that disconnected, I still see the 0.3mA draw. But unfortunately it doesn't seem to be a straight resistive short in the system. 12V/0.3mA = ~40kohm. But if I pull the battery completely and measure resistance from power to ground leads, its open circuit, well above Mohms anyhow. A few careful checks also showed a bit of a spike in current to several mA when I first connect the ammeter, which quickly drops to a consistent 0.3mA after a few seconds.
Anybody seen anything like this before? Suggestions where to start poking/disconnecting/measuring? I really don't want to kill another battery, but disconnecting a lead every time I get home is going to get annoying very fast...
Thx!
KF