| Author | Message | ||
     Guard_rail |
Is Anyone else waiting for one? Are they on back order and is it bad to ride it while I wait cause I ain't wait'n no 4 months!!! | ||
| Motorhead102482 |
I'm pretty sure american sportbike sells these. | ||
| Boogiman1981 |
i had to convince them to take one off of a showroom bike last sept when mine failed | ||
| Boogiman1981 |
as for riding with a bad one. probably not 'bad' but it'll leave ya walking | ||
| Rt_performance |
they ordered mine a week ago Friday. Got called today it is in. So they are not on back order | ||
| Tpoppa |
Can someone confirm that the regulator is the same part number for 08 & 09? | ||
| Froggy |
Same part. | ||
| Tpoppa |
Thanks Froggy. I had an interesting chat with a reputable source that suspects the regulator is likely the root cause of the failed 09 stators. The regulator was designed to shunt the excess heat/energy from a 432w stator. 520w is a 20% increase (no small amount), the regulator now has more heat/energy to shunt to ground. If the heat cannot be shunted as efficiently it builds up in the charging system...add that to the additional heat from the more powerful 09 stator. You know the rest... The harness upgrade is a $4 bean counter band aid to remove heat/energy from the charging system. A solution would be (with harness upgrade removed) to retrofit to the 08 stator/rotor, or to have the 09 stator rewound in a configuration to generate the same power as the 08. A higher spec regulator wouldn't hurt either. | ||
| Dirty_john |
I wonder if I can get hold of a voltage regulator rated at approx 520w from a jap bike. Now what size alternators do HD Sportsters have I wonder as well. Never heard of a Sportster having issues like the stator problem. | ||
| Rsh |
Over on the Aprilia and Triumph boards a few people are trying Mosfet type regulators, the initial results look positive. Could be of interest especially if your warranty has expired. This is not a shunt type regulator, it is capable of switching the stator on and off as needed to meet electrical demand. The regulator is made by Shindegen. Shindegen also make regulators for Yamaha, Honda, et al. Here is what it looks like:   From what I have read on the other boards, the price can vary from $50.00 on Ebay to about $150.00 new. | ||
| Tpoppa |
That regulator seem's like a similar approach to the harness upgrade in that it's switching off part off the stator. I think the better solution would be a less powerful stator (432w-450w). Our bikes were designed to work with a 432w stator and can operate as low as 343w (520 * 2/3), although not ideally. | ||
| Rsh |
Is that saying the engineers overlooked the electrical system and mechanical environment and just arbitrarily put in a higher output stator without thinking of the consequences? Most systems are designed with some amount of built in margin, If the 88 watt peak output difference at 7000rpm between the 08 stator and 09/10 stator has over taxed the electrical system (wiring, voltage regulator) and the mechanical environment (not enough cooling oil flow) it could be the case. | ||
| Reepicheep |
I was thinking about building one of those mosfet regulators, it would be a fun exercise. It is definitely worth a try, and it *will* take some heat out of your stator. Just make sure the regulator is rated for sufficient power. You probably need to source one with the right number of phases for the input though... Or add some diodes (*big* ones). | ||
| Rsh |
The Shindegen FH012AA is a three phase voltage regulator, regulated voltage is 14.5, current output is rated at 50 amps. As I posted earlier, a number of people on other boards look to be having good, if not at least better luck using this regulator. Some people have also done some research looking at the actual control/switching capabilities of the unit, posting graphs of actual measured inputs and outputs. It's just another option that someone may or may not be interested in. | ||
| Tpoppa |
Is that saying the engineers overlooked the electrical system and mechanical environment and just arbitrarily put in a higher output stator without thinking of the consequences? I doubt it was an arbitrary decision, but something in the charging system was obviously overlooked or not tested to duplicate real world conditions. The stator failures speak for themselves. The 1125 was originally designed to use a 432w stator. The 08 432w stator has proven to be reliable. The 09 charging system produces more heat than can be managed. A less powerful stator seems like the best solution. I would trade 80 watts for better reliability any day. | ||
| Boogiman1981 |
i'll take the 80watts and get a new regulator if anyone wants to swap | ||
| Boogiman1981 |
lol i also wonder if the regulator we have could do the job if the environment it was in was a little cooler... | ||
| Boogiman1981 |
another question i have from this if the voltage is below the set point all the regulator is doing is rectifying the AC correct? for instance my IC rarely shows more than 13.9v occasionally as high as 14.1v but usually in the between 11.9 and 13.8 sitting still vs cruising. | ||
| Reepicheep |
So it'll handle 725 watts output... That oughta do it. | ||
| Rsh |
Reepi, Are you being funny? or do you not know the difference between watts and amps? And where is 725 watts coming from? 2008 1125 stator is a 32 amp 432 watt system. 2009 1125 stator is a 37 amp 520 watt system. The Shindegen FH012AA should handle the voltage regulating duties, It is more readily available than the Buell/Rotax regulator. As said, could be another option. | ||
| Reepicheep |
Watts is volts times amps. If the regulator is rated for 14.5 volts output at 50 amps, the regulator will handle 725 watts before failing. The fact that the 1125 is either a 432 or a 520 watt system means that it will be impossible for the stator to overwhelm the voltage regulator, so that means this regulator is a good pick for this application. You have a lot of margin, which in the electronics world, means lots of reliability. The fact (assuming it is a fact) that it is a true switching regulator rather than the factory shunting regulator has two other important benefits... 1) When the bike doesn't need more power, the system won't be putting that power through the stator windings to then just shunt it to ground. So the stator will run cooler. Maybe not a lot, but 15 watts will run a soldering iron, so if you can take 45 watts out of the stator that's a non trivial amount of heat. 2) A switching regulator can step up voltage... you can feed it 5 volts in, and get 14.5 volts out. So where the factory shunt regulator ignores everything below 14.5 volts and only picks off the peaks of the rectified sine waves, the switcher can use the whole waveform to produce useful power. So at low RPM (where the stator output voltage is lower), the switcher can still produce ample power. | ||
| Rsh |
Correct  | ||
| Tpoppa |
Have to check the manual, but I believe the Regulator is 45 amps. 432 or 520 is a rating for a specific RPM, probably 5,000. The 09 stator is obviously producing more heat than can be managed. See fried stator photos. | ||
| Boogiman1981 |
in researching this further the yamaha R1 uses the FH012AA on a few of their bikes... http://www.tlzone.net/forums/tl1000s-tl1000r-forum /111908-ok-so-where-does-one-get-one-theses-fancy- shindengen-r-r-s.html |
