Surron Light Bee X Owners Manual: https://sur-ronusa.com/content/Downloads/owners%20manual.pdf

Surron Ultra Bee Owners Manual: https://acrobat.adobe.com/id/urn:aaid:sc:VA6C2:e14d7113-134e-4c3a-882e-e88dcc11ad22

Bearing Service Guide: https://www.youtube.com/watch?v=RjMLlF1GQnc

Overall cleaning and service: https://www.youtube.com/watch?v=Vp8xWzwYFJ0