| Author | Message | ||
     Bubba_ |
I've had this 09 1125R a few years and really have been pretty fortunate. It's got about 3100 miles or so and is very much stock. The PO had installed a anti gravity lithium battery, and it's been great. PO said he was having to charge the battery a lot, so he went with the lithium. Anyways, I accidentally left the charger going overnight the other day... But, I wasn't too concerned. It hits full charge and I assume stops the juice. I cranked it up and headed to work, and noted voltage jumped up over 15! Cluster blinked off and then on... I switched the bright lights on and took it back and parked it lol. Btw, I had already purchased the compufire VR that some here have opted for... I have had it several months. Well, I installed it in the stock location. I spliced the plugs. Install was pretty uneventful. After all was done.. She cranked up fine. No CELs. Voltage stays in mid 14s.. I've seen some as high as 14.8.finally, after some hi way riding and letting it idle after.. Voltage got down to hi 13s. Any thoughts? I was concerned the voltage being in mid to upper 14s so much. Oh, I did remove the Harley bandaid too. Tia | ||
| Nuts4mc |
the stock head lights pull much of the current (amps) ...but the excess power that is left over is bleed off as heat energy by the VR...might want to think about putting the VR "out there in the breeze"...I run a similar set up on an '08 ('08s had lower power'd stator) and see 14+ volts most of the time...I run HIDs for headlights...so I expect my voltage to be "high"...so far so good for over 5+ years. | ||
| Bubba_ |
thanks Nuts  hypothetical say I installed a higher voltage consumer (like headlights) would that = less heat absorbed by the VR? I had considered most all the options regarding the VR; noted the other units available, etc. other install locations.. 1 reason I chose the route I took was others here had good fortune w/ the compufire in the stock location; seemed good to me; and there is air-flow at the stock location I think; note the 'vent' located just in front of the VR near the cowl key. having said all that.. its definitely hot to touch after a moderate ride (Message edited by bubba_ on August 15, 2017) | ||
| Hootowl |
Yes, the more power your bike dissipates, the less power the VR must dissipate. The output of the charging system is constant...max amps all the time. Any current not run through the lights, etc. runs through the regulator. | ||
| Hootowl |
I'm referring to the stock VR. I don't know about the compufire. It may not operate that way. | ||
| Bubba_ |
Hootowl thanks what you say sure makes sense to me. maybe i need another upgrade or 2  | ||
| Hootowl |
"The output of the charging system is constant" Point of clarification: It obviously varies with RPM, but it is not variable based on load. The stator puts out what it puts out, and all that current either has to go through your lights or get shunted to ground through the voltage regulator. | ||
| Coastrambler |
A shunt VR does cause the rotor-stator to put out max power, the excess of which is shunted to ground resulting in heat. A series VR causes only what power is needed to operate the bike to be drawn. This results in a cooler stator. The VR itself also runs cool. I have a series VR behind the license plate. It barely feels warm to the touch after a long run. | ||
| Bubba_ |
so far so good; wish I had seen these before I did the splicing | ||
| Joe7bros |
+1 to Coastrambler. I used a SH847 from Rick's, mounted behind the license plate, worked well. |
