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ionbeam wrote: ↑Fri Feb 02, 2018 11:24 am Is that right at the battery posts? Using what to measure the voltage? Where did you put the ground lead of the measuring device? In a perfect world you will be measuring directly across the battery terminals with the engine turning >2,000 rpm (after letting the engine run for 3-5 minutes after starting, allowing the battery to recover from starting the engine).

Are there any electrical accessories turned on?

The Gen II seems to have a lot of voltage loss between the RR and the battery terminals. Some have resorted to supplemental wiring harnesses. I do agree with the tech, you don't have a problem or fault, you are perceiving a 'not preferred' situation.

Anyplace from 13.4 to 15.5 volts on the battery terminals is good, though on a FJR you probably won't see more than 14.5 ever. With 13.2 volts at the battery terminals it starts to get worrisome, that is the lowest voltage which will maintain/charge the battery. At 12.8 volts at the battery terminals the charging system is tapped out and the battery is being discharged --or-- a large voltage drop in the harness is happening and the battery is being discharged. You can usually find this severe type of voltage drop in the harness by the laying on of hands (it'll be hot) or it will be melted. Usually groping touching the connectors is how you will find the heat.

On a Gen II I wouldn't be too concerned about 13.7 volts unless you are planning to add some ampeater accessories.

Harald wrote: ↑Wed Feb 28, 2018 2:12 pm My 07 was down to that and for me it became a problem when running heated gear/grips in the winter, especially when at idle during stops. I bought a new harness that goes between RR and the battery from Jack at roadstercycles.com and suddenly I'm seeing 14.2 on my built in voltmeter (connected directly to the battery through a relay) when rolling down the road and very little drop when full heated gear activated. I'm guessing you don't have that need in LA though?

Harald wrote: ↑Mon Mar 05, 2018 3:22 pm Sorry about the mistype on the URL, but looks like Ionbeam hooked you up. Dcarver over at the other FJR sandbox did an extensive write-up on the harness if you want to read more details.