I use Mobil SHC 100 GreaseWhat is the recommended grease for the BBS1?
+1 for the Lekkie cover.... Great bit of kitAh ok, sorry I can’t help then.
The gear does need greasing every 500 miles or so, hence acquiring the skills / tools to diy would be worthwhile.
If you do end up having the motor serviced, get them to fit one of these covers, which includes a grease nipple:
Lekkie Final drive cover for Bafang BBS01/02(B)
Full CNC 6061 alloy drive side gear cover and gasket replacement for the standard plastic cover. on Bafang BBS01.02(B) motorswww.brightonebikes.co.uk