07 990 adventure Regulator/Rectifier problem
 

Hello everyone. About two weeks after a 200 miles run, my Shorai battery was dead. Down to 2.3V. Shorai tested it and concluded a slow drain had killed the battery. They prorated up a new one for $48.00. Thank you Shorai.

I thought the slow drain was due to a Delorme PN60 GPS left plugged into the power port, however, Delorme states that the have a cutoff circuit when the GPS battery is fully charged.

The bike draws 1.59mA which is slightly high thus showing a very minor parasitic drain, Most likely the heated grips switch. This is not enough to drop the battery to 2.3V in 14 days.

I tested the charging system today and found that at idle, 1500rpm, reading is 14.01V and at 4000rpm it's 13.85V. To me this indicates a faulty Voltage Regulator/rectifier which resulted in my dead battery.

Does anybody agree with my observation? or have another suggestion?

Thanks
Miles....

The Voltage measured is ok. A working regulator should charge between 13,5 and 14,8 Volt.
So in my opinion yours is ok. Have you tested it with all users on? Lights, Grip Heating, brakes lights? How far does it drop? If it doesn't go below 13,5 then in my opinion the rectifier is ok.
Somethings is draining your battery while the bike is off. That's what you'll have to find. Best is to unplug one after the other and keep checking with Amp Meter.

Greets

Claudio

With everything off the bike should have a 1mA drain due to the clock. When I un-plug ACC1/Clock fuse, the drainage stops. I have not had the time to tear down the front end (again) and look for the problem.

I always thought that a voltage regulator would increase voltage a slight bit, but not go too high, as RPMs increased. I tested on a cool morning. The dead battery occurred on a 100F+ day. Is it possible that the Regulator malfunctions at higher temps?

Thanks

I still don't think that the regulator is the issue. Compared to the Africa Twin, on the KTM they are fixed to a place where they should get cold air to cool. Generally speaking: a battery should have 12.8 Volt when she's not connected and healthy. Everything below that indicates she's unhealthy or discharged. Therefore, when your engine is running you should be able to measure more Voltage than 12.8 V. How much more is actually secondary, as long as your injection and ignition system is not solely running on battery power. Which again would be indicated by measuring less than 12.8 V at the Battery.
But also be aware that Voltage should not go higher than about 14.8 V, otherwise you fry the battery...
So, check all your connections for clean plugs and if all the mass screws are tight.
I still believe something is draining your battery while the bike is off or your battery is damaged. What have you hooked up to the ACC1 Fuse? And the story with the GPS; i don't really believe that it turns off if its full. We always connected all GPS through a relais to be sure that when the bike is off the charge stops.

Greets



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+1 for this post.

Electricity is funny stuff but this is a useful fault finder:-
http://www.electrosport.com/media/pd...ng-diagram.pdf

Good suggestion checking and cleaning all multi wire connectors. I have to tear apart the front end to check ACC1 circuit and what's plugged into it. However, I have also read that a bad Regulator will also drain the battery while the bike is off.
I discovered that ACC2 is key driven and I believe the heated grips are in ACC1 which is always connected to power. If this is the case I will obviously make the change to ACC2
Thank you for the advice.