How do I do this mod?
My big bearing has completely seized up after a particularly wet and muddy session. Any tips on cleaning or replacing it? I canāt figure out if thereās a dust-cap on it (itās not budging if there is).
Iām surprised to see how much corrosion is building up there as well. Is it worth brushing this back and then sealing it with conformal coating or something?
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Remove the big bearing and use them till they die. The only way. 
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You canāt fix a seized bearing, might last longer if you replace it with a sealed one.
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Christ almighty. It only had 50 Kms on it! 
Any clues as to what bearing Iād need to replace it with?
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the stator iron is very easily rusted because its a weak iron or something along those lines (dont know the english name), a bit of rust is not that bad.
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Yea, my bearing died after 50km as well 
I forgot what size that bearing was, donāt have them anymore. You can measure the id/od/width with calipers and get the same thing with a 2RS suffix, Iāve seen them on amazon.
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It should have markings on it?
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6809 2RS. Even then. I still recommend not using them. Even high quality big bois will seize because of centering issues. Heck, even original NSK 6809 DD bearings seize up. It just be like that. 
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maybe the ones with extra room between the balls and the races work since they allow for more heat expansion?
oh wait those are the DD i think 
Not really, itās very weird with these motors. They have varying center offsets. Some might be fine, but others will require some insane amount of force to reassemble with proper bearings and die fast.
DD are free float shielded NSK bearings, the shielding doesnāt touch the balls compared to 2RS.
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Itās a 6809Z.
I soaked it in oil for a day or so have flushed it through a few times. Now itās spinning quite nicely again.
Reassembled it. Now Iām hearing what Iām guessing is a rubbing between the can and the stator. Can was thoroughly cleaned and oiled and looks perfectly aligned so donāt know wtf is up now.
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Do not use the bearing. 
Yes, it will result in unknown issues. Itās been heavily tried to make them disappear to no availā¦
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Problem categorically was the bearing. There was no can/stator rub. Pulled it off and replaced it with an SKF 61809/6809 2RS1. Itās like night and day. Smooth as silk.
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anyone know the size of the rear bearing
mine seems to have blown up and died inside the motor leaving just the outer race left.
anyone know how i can remove the outer race and replace the bearing?
thanks
if anyone has 1 of these in the 210kv version and wants to sell then pm me. need one urgently
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210$ after shipping
insanely expensive
thats my last resort
You may be at the last chance saloon I thinkā¦
To just find one sitting on someones shelf I think is gonna be a hard call. And from a reseller you may find theyāll be even more expensive. Perhaps this little bump might find one though. Good luck.
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