bolkow, it is probably just me but i do not catch the relevance of your statement?
signcutter, i hope you enjoy the read. If you have access to TIPI, you will find quite a few information notices and service letters as well as sb's related to the twist grip of both the 2B1 and 2B and mod statusses. It is important to know what machine you are in especially when it comes to moving the twist grip with the battery off!