F800gs Stator checking and replacement.
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- čas přidán 29. 06. 2024
- Replacing the stator on a 2009 BWM F800gs Motorcycle. This is a known weak point on these motorcycles. I used an electric-sport stator replacement and have not had any issues, but it’s only been a month since installation so that does not really mean much. My current understanding of the root issue is that the voltage regulator/rectifier is the “shunt” type. Shunt type regulators always draw full power, 400 Watts in this case. This means that stator is always drawing/creating 400W and creating that power generations associated heat. This heat breaks down the insulation and the coils start to short to themselves (hence 0.2 Ohms) and to the case (hence measurable resistance between stator legs and case) With all this internal shorting, the problem builds until one day it does not produce enough AC voltage to feed the voltage regulator/rectifier enough energy to charge the battery. This issue presents itself by at first weak starts, then the ABS light comes on, then the headlight turns off, then the fuel pump gets weak until the battery is just drained and there is not enough to keep up with fuel delivery to the engine and it shuts off leaving you stranded. This can happen in a single ride. I recommend installing a method of monitoring the battery voltage live on your bike so you can see this issue coming quicker. If you do not see the voltage above 13.5v when running, you may have this issue.
- Auta a dopravní prostředky
Great video. Like the humour also 😁
Thank you.
You might want to use an impact wrench.
Thanks for the video! My mechanic said that the regulater should be replaced too if the stator is broken. Any thoughts on that? Can I check if the regulator is still working?
Well, its been about 6-7 months since I did this work without doing the Regulator/Rectifier and nothing bad has happened yet. I have heard that same thing but I guess I am a data point of 1 where not replacing it has not caused a problem in 6-7 months and a few thousand miles of riding.
what is the reason of very hot regulator/rectifier in GSF800?
Should I change the regulator and stator? or the regulator only?
One question. In the first part of the video, is the motorcycle complete off or you engaged the contact?
I want to test my GS but I don"t know if it"s enough to test it when the motorcycle is complete off.
You check the resistance (ohms) with the bike completely off, don’t even need the key.
You check voltage (Volts) with the engine running. Careful here. Don’t accidentally short any of the leads to the others or you will get a big spark and do a little more damage.
@@Forshledian thank you ^_^
I own a gs f 800 adventure, just replace new Stator/ Rectifier and my plug is very hot, 263 f almost melted. I removed both earth ground, clean and added Dialectic grease. Any reason for the high heat on my plug? Thanks Joe
I think cleaning/adding dielectric grease is a good first step. If your connections were loose, that could be a large source of heat. Cleaning and greasing would help here. I think the steps you took were good first steps. Now just monitor the situation and if the issue persists, maybe review the connections between the individual pins of the connectors and the wires. If any of those are loose, that could also be it.
Keep in mind the stator is always producing full power regardless of the load on the bike. The stator is always producing full power sending it all to the Regulator/Rectifier. The Regulator/Rectifier (aka R/R) delivers only what the bike is asking for and burns the rest off as heat (hence its big heat sink on the outside of the bike). This full time/full power condition means that connector is also always seeing full current from the stator.
@@Forshledian I will probably hardwire if my plug melts. I bought China made Stator, which has good current, it’s the Rectifier that came with it I am concerned about. My Diode forward bias reads .200 .200 .200 on my yellow wires
@@Forshledian I always use Dialectic Grease on these connections. But why does the connection melt. I am going to Hard wire and use shrink wrap and see what happens. Thanks for listening to my Rr/Stator wire issues. Motojoe and Duke
Is it right that models until 2012 year had this problem? From 2013 they fixed this issue?
Honestly not sure…. I don’t do this full time. I just had a problem on my bike and just learned what I needed to fix it… but kinda ended there
No talk..
medium rare.. ahahha what type of sealant do you use in that rubber?
To secure the stator mounting bolts? That was just blue lock-tight.
To secure the rubber around the stator wires, just run of the mill silicone sealant from the department store.
@@Forshledian the silicone , thanks