Sinbord1981 said:
Regards the lack of grease, maybe I will crack the motor open soon. This is the second gen GS510 though, so at least it'll have the all steel gears. Have you opened yours and repacked with grease? I have watched the videos and it seems a fair amount of work, possibly needing to drop the motor out the frame to work it on a bench. I've got the crank arm puller but will need to sort out a removal tool for the spider retaining collar. Any recommendation for the spec of grease and did you also replace the gaskets on reassembly? I do plan to crack the motor open myself in a few months to check on wear so will probably wait until then to do it. Do you have a video of yours so I can judge how noisy mine is in comparison? Cheers buddy. It's a shame then not a grease nipple on the block so you can do it without needing to open it all up but I guess it will need a good clean out and degrease before re-packing anyhow.
hi, i have seen you have the 52V battery. motor has higher rpm and is a little louder with fully charged battery instead of using a 48V battery. my setup is a little different:48V battery with 45A current (shunt mod) - but i think my motor is even with the resulting 2000w a little quieter. But hard to say based on just a video.
yes, you have to drop the motor out of the frame to grease it. i would not say regrease because there is not much grease inside

.
motor disassembly from frame:
1) remove your ISIS cranks.
2) using a chain wipe and a bottom bracket tool (i recommend buying a nut,Hollowtec II 1/2“) you can open your spider nut. clock wise (!)
3) remove the 3 nuts of your 3 screws holding the motor. dont forget the 3 washers.
4) put something under your motor to hold it when screws are loose.
4) now one of the more difficult tasks: knock out the 3 screws evenly. i always use a ratchet extension and a hammer.
5) disconnect cables
6) to put it together again you have to reconnect your cables. Check all functions, use your throttle, motor should turn very,very slow - thats normal without speed sensor . attention: dont squeeze your cables. your motor screws should go through easily (the first 2 cm). take an allen key nut to knock in the 3 screws evenly with a hammer.
motor disassembly: just unscrew the 5 or 6 screws holding the 2 motor parts (motor- and controller-side) together. carefully separate the 2 parts - attention: the 2 parts are still connected by controller cables - just for greasing you dont have to separate the cables. take care of the gasket while separating. you can clean the gasket with alcohol and reuse it. take out the 2 small gears, holding both gears at the same time and lift them gently - it is easier to grease then. clean all sealing surfaces with alcohol.
grease it like hell (!). then put it all together again - there are 2 dowel pins so you cant do it wrong. i used 5nm torque for the motor screws.
I use liqui moly LM47 ( https://www.ebay.com/itm/293068815879 ). so far it is not loud and i have no problems. i used around 2x tubes of liqui moly - putting grease in all holes. maybe too much but it works...and i dont know the reason for having air around the gears...
but perhaps there are some other experiences...that would be interesting…