hello,

I am rebuilding a 1985 K100. Have done this before so I have some experience but this one has a problem that I don't  get.
removed the lunch box and replaced it with a BEP 3.0 and acewell dash. Everything is working fine only the speed indication is acting up.
it will only work when the bike is in gear. This is weird as there, as far as I know, is no link between the 2 circuits of gear indication and speedo.
Maybe I am missing something?

When I turn the rear wheel manually on my other K100 it will indicate speed when in neutral but this one doesn't.

maybe someone has some feedback on this.

thanks, M