My 2012 WR450 has the baja designs DS kit installed, has approx 10k street miles and ~ 500 dirt miles on it. Last tuesday as I was riding home from work, the check engine light came on and about 10 seconds later the bike died. I checked the oil level to make sure it was not do to low oil pressure and the level was fine. Attempted to start it and it kick started but immediately died. Tried to start it again and no lights and the fuel pump did not spin up. After getting the bike home, I jumped started the bike and started right up and took the jumper cables off and measured the voltage and it was 7.3 volts(with bike running) at the battery which indicated to me that the rectifier/regulator assembly was not working charging the battery and the bike eventually died. So I ordered a new rectifier/regulator assy and put the battery on my charger and when fully charged was reading 12.7 volts. Maintained it on a trickle charge till the new assy arrived. Installed the new assy and battery. Started right up and measured the voltage at the terminals with the bike running and it read 12.9 volts. Rode the bike to work and home yesterday no problems whatsoever. On the ride in to work this morning and the exact same thing happened as last tuesday. I live in western washington and it has ranged from 20 - 40 degrees over the last month. Have had no problems till last tuesday. I have not checked the stator output yet.
1. Anyone else had any similiar problems like this?
2. Could the battery have been damaged by being discharged down to 7.3 volts that it caused the new rectifier/regulator assy to fail in a day?
3. Anyone with any thoughts on what to check before I have to take it in to a dealer and spend $$$ to troubleshoot an electrical gremlin.
Edited by Grover9876, December 19, 2013 - 10:26 AM.