| Author | Message | ||
     Sprintst |
Buddy's 2009 1125CR is going in for the harness recall he hasn't had any issues, but is just at the 1st oil change - only 450 miles anything he should ask/know? | ||
| Rt_performance |
That it really doesn't fix anything and his stator will burn up eventully..... | ||
| Timebandit |
More realistically speaking, the harness upgrade is a cheap fix that is helpful, but is kind of a band-aid solution to the problem. It removes a fair amount of heat from the stator by single-phasing it. (There's a thread in this forum that's easy to find if you search for the string "single-phasing".) The downside is that when the charging system is single-phased it's output sucks and it won't charge the battery. The moral of the story with the harness update is that you have to keep an eye on the relay for failures, and that is not good to keep the bike in the dead zone from 2000 to 4200 RPM. In terms of stator protection, better options would be an oil jet upgrade for the rotor, or switching to a series regulator. Or better yet, to a switching regulator when the become available. (Message edited by timebandit on January 25, 2012) | ||
| Dannybuell |
I undid mine a while back... http://www.youtube.com/watch?v=nBYEYGJfyBw&feature =youtu.be | ||
| Timebandit |
Danny, I can't remember -- did you tell me previously that your riding style places you in the low-RPM band on the bike that overlaps the area where the charging system gets single-phased? If my memory is working, and you always ride below 5000 RPM then the harness upgrade would be bad for your battery. I can understand exactly why you'd disconnect it. But bear in mind that by taking it off, you assume some risk: you are choosing to operate the bike under the worst possible conditions for burning up the stator, and you've thrown away the protection that was designed to help you in exactly those riding conditions. I don't think that's a good avenue to recommend to someone who's unfamiliar with the bike and is looking for advice. | ||
| Ridegreen2oo |
Now that I've checked out EBR'S site about their reduced output, low heat stator kit, they state there is "We have found the ’09-’10 1125 charging system provides excess current required for racing duty, in addition to an unnecessary heat load into the oil at high rpms". So is EBR claiming that keeping the revs up high is killing the stators, and the problem isn't if you keep the revs down low? | ||
| Froggy |
They didn't say that. They said the 09/10 stator gives off more power and heat than needed for racing duty. The lower output kit reduces rotating mass and the amount of heat the bike produces. | ||
| Timebandit |
I know that this is nitpicking, but I hope this will clarify any misconceptions that could come from imprecise explanations. It's not really a difference in rotating mass that makes the difference. The difference comes from two things: a) different magnetic strength of the rotor's B-field (which is ultimately what limits current generation and is not necessarily proportional to mass), and b) different winding of the stator coils, which are a non-rotating mass. But Froggy is right -- they never said what you think they said. What they said is that the lower output kit is adequate for racing duty and produces less heat. The reason for this is that the race bikes only have to power the fuel injectors, fuel pump, and ECM. They don't have to worry about lights or other accessories for street bikes. A number of people misinterpret this to mean that the 2008 setup is better for street use. Bench testing has shown the the 2008 charging system is really marginal for street duty. H-D realized this. that's why they created the 2009 system in the first place. Getting back to the OP's question, EBR isn't explicitly stating it, but the truth is that there are two things that kill the stator: 1. Inadequate cooling 2. Excessive heat generation Inadequate cooling happens at low RPM/low speed because stator cooling is a function of oil flow (RPM) and airflow across the oil cooler (MPH). Excessive heat generation happens because the voltage generated by the stator is a function of RPM, and the heat dissipation is directly proportional to the voltage drop between the stator and the shunt regulator. Low RPM/low speed results in less cooling. High RPM results in a LOT more heat. The balance lies in between the two extremes. | ||
| Sprintst |
I think he's likely to keep the rpm's down a lot I also think he's not to the point of doing any out of pocket $$ fixes either, since it's a pretty new bike still under warranty So, get the "upgrade" or skip it? | ||
| Avc8130 |
Get the upgrade and ride the bike properly. Idle or 4500 rpm +. This is not difficult or impractical on a CR at all. I know, I own one, I commute on it. ac | ||
| Timebandit |
^^^ what he said. |
