Bongo Fury

I have a long standing revcounter glitch, it works perfectly then drops like a stone. remains non functional for various durations then springs back to life as and when it feels like it. Not related to road conditions etc etc and no other electrical problems. The Forum seems to suggest the NE sensor/sensor crankshaft position, but where is it located? Can anyone help, thanks.

Item 20 - H10 on the front engine cover - it's called a pulse generator

http://www.lushprojects.com/bongopartsm ... o=.html#16