Thanks Big wheel. Take your point. Recently after a YouTube suggestions that bafang should have grease replaced from new, also another saying 1500lms.i had 3200kms after 1 year and worried.
When I opened up cover I was shocked to see how little and dirty lubrication. So I cleaned out the lot and replaced with lots of Shell Aero 22. Next 1500 I'll explore idea of brazing on small grease nipple above main gear. Perhaps it won't be possible. Any comment from others welcome.