07' FJR stator output

[Slow2]

I'm about to pull the trigger on an 07' FJR and I was wondering if the stator output was going to be able to handle my Gerber heated gloves and vest? I plan on running a fused harness straight from the battery to a contoller for the temp. I'm a year round rider and with the gloves and vest have ridden down to 19 degrees and stayed comfortable. I had to upgrade my 04' Roadie to a late model stator and relay to handle them. Anyone have any experience with this? Thanks in advance.

Ed

 

[ionbeam]

No problem running gloves & a vest. You have ~200 watts to play with. Recommendation #1 is to run your temp controller via an ignition switched relay, with the relay connected to the battery. Recommendation #2 is to install a volt meter such as a Datel to monitor your voltage.

 

[WRichStrom]

I use a Gerbing jacket and gloves and there is no problem at all. With the setup you have right from the battery works great for me.

WRichStrom

 

[Warchild]

No problem running gloves & a vest. You have ~200 watts to play with.

I believe you may be a touch generous here, Alan. Mathematically, yes, roughly 200 watts of "room" is about right, but in real-world practice, the end-user should see about 150-160 watts of available juice before you start to see the Datel numbers tumble down to an undesirable reading.

Then again, my notion of an "undesirable" constant readout is ~13.1v (and lower), continuous. The bike is actually still running okay at 13.1v; you're not actively discharging the battery at this reading, but your stator/charging system is working like a dog at this point. Running the bike like this often (over time) is a main contributor to all these photos of smoked stators we've seen over the years.

 

[SkooterG]

Then again, my notion of an "undesirable" constant readout is ~13.1v (and lower), continuous. The bike is actually still running okay at 13.1v; you're not actively discharging the battery at this reading, but your stator/charging system is working like a dog at this point. Running the bike like this often (over time) is a main contributor to all these photos of smoked stators we've seen over the years.

Electrical idiot here, but I have never been clear on this: I thought the FJR's charging system is ALWAYS on full blast (working like a dog) and just sending to ground any power that is not needed at the time?!?!?

And photos of smoked stators notwithstanding, how many stators have actually failed on an FJR? I am not aware of any. I know beeroux's stator looked crispy when he took his out of his 05 FJR around 75k IIRC, but my theory is that they ALL look that bad after a few miles but still perform without any appreciable degradation. I know I am only one data point, but I have 159,000 on my stock stator and so far so good.

 

[big ears]

Any increase in load on a generating system running at full speed should make it run hotter but I have no idea if it would hurt the stator. I know that any electric motor when overloaded will overheat but that is overloaded not just a full speed. But I ain't sure of much.

 

[ionbeam]

Then again, my notion of an "undesirable" constant readout is ~13.1v (and lower), continuous. The bike is actually still running okay at 13.1v; you're not actively discharging the battery at this reading, but your stator/charging system is working like a dog at this point. Running the bike like this often (over time) is a main contributor to all these photos of smoked stators we've seen over the years.

Electrical idiot here, but I have never been clear on this: I thought the FJR's charging system is ALWAYS on full blast (working like a dog) and just sending to ground any power that is not needed at the time?!?!?

And photos of smoked stators notwithstanding, how many stators have actually failed on an FJR? I am not aware of any. I know beeroux's stator looked crispy when he took his out of his 05 FJR around 75k IIRC, but my theory is that they ALL look that bad after a few miles but still perform without any appreciable degradation. I know I am only one data point, but I have 159,000 on my stock stator and so far so good.

The battery voltages I've suggested are in line with Warchild's.

I know of a couple of recent Electrosport failures. I can say with certainty that my stator was never electrically abused.

Yes, the R/R dumps all excess power to ground so the stator is always pumping out power. The amount of power will vary with RPM up to ~5k rpm where it maxes out. The SCRs in the R/R will shunt power to ground to maintain a maximum battery voltage in the area of 14.5 volts. As more power is needed to service the bike and rider the SCRs will reduce the amount of power shunted to ground. At some point the SCRs will be completely shut off and the stator's full power will be routed through the rectifiers to the electrical system. This is the point where the electrical system can start to hurt the stator because there is nothing to limit the amount of power that is being drawn from the stator :wackosmiley: