Opening any of these motors voids the warranty, but most reputable shops have the firmware and diagnostic tools for these motors (as well as the ability to send them back for issues/service)
If you think something like a Super 73 will be serviceable by anyone, go nuts king
Which one of those (Bosch, Shimano, Fazua, TQ) provides parts and service manuals to the end user for dyi repair?
Opening any of these motors voids the warranty, but most reputable shops have the firmware and diagnostic tools for these motors (as well as the ability to send them back for issues/service)
If you think something like a Super 73 will be serviceable by anyone, go nuts king