I'm not sure where the current state of knowledge has reached regarding motors for folders but, in case it's not been mentioned before, Tongxin appears to have made a narrow motor for folder forks.
I got a Christmas email from Diana Lin at Tongxin which mentioned that "we have developed new 80mm wide motors for narrow forks and strengthened the teeth on this mini-motor for a roller brake to be assembled."
Frank
I got a Christmas email from Diana Lin at Tongxin which mentioned that "we have developed new 80mm wide motors for narrow forks and strengthened the teeth on this mini-motor for a roller brake to be assembled."
Frank