You've solved one problem, but created another. As the motor casing is a sealed unit, you'll need to include a breather, or another removable screw to allow for release of the pressure that will build up when you add grease. Other than that, it's a good work around for a pain in the rear process.

That is WAY too much grease in my honest opinion. Not removing the old grease, not great. Frankly you can remove the few screws on the cover, not that hard. This is gonna work, ofc its going to be silent, but the gears are going to fight and "swim" through the grease now. I would have stopped at like 30 pumps max. You did stop at 40, then video cut and you go "so i put 80 pumps in there". I could not hold a good chuckle. I am not a mechanic and maybe i am wrong, but those 80 pumps seem to be a LOT.

Awesome! I came up with this idea myself and went online to see if anyone else came up with this idea, and sure enough, you made a great video on this. Thank you! I don't think a vouple of metal shaving will be a big problem. I'm not taking the motor out.

Wow, are you sure thats enough grease. You should have added a tub of butter just to be safe...unsalted

I dono how i ended up on this video but looking at this it's definitely not a good idea to add that much grease. There is no gasket inside the housing so you'll eventually start leaking grease into the electronics as some will break down. Never drill into a motor and leave shavings in there open it up drill your hole and add maybe 10 pumps to start with. Some motors make more noise then other that is fine. I would honestly do this modification on my own bike run it for 100 -250 - 500-1000 miles and then come back and post the video once you've identified that it will not cause issues!

lots of reasons to open up the case and keep it clear and get good thread cutting. dont do a half ass job. to it right the first time.

less is more.

Old grease with metal dust mix in with new grease not good .If it would be oil would be a different story oil would come out

too much grease I think will be hard for the motor, maybe a gear oil has less of a drag. Usually, the noise is coming from the slightly worn-out bearings. You hear less noise because the grease muffled the bearing noise. In my opinion.

Without a second hole for a breather it would get pressurized wouldn't it?

I just re-greased two Ultra motors. One, with 1500 miles on it, had almost no grease (and a lot of metal shavings) and the other had a decent amount, which after watching a number of KZread videos on greasing an Ultra motor seemed to be the correct amount.

Excellent...thank you for sharing this. An another commenter said, Lekkie make a replacement cover for the BBSHD that has a small hole for inserting grease with a micro grease gun. I've been pumping my BBSHD full of grease for 4+ years now and I've never encountered any problems...only quiet and buttery smooth. So the "you're overgreasing it" chorus is mistaken...at least for these motors.

y tho?