Re: How do i take my tach apart?
I have the same bike 2000 m900 and had the same problem. The tach is sealed. What I did is take it out of the gauge pod and cut the thing apart with my dremel right behind the face of the outer ring. Not through the cylinder but more around the actual ring, if that makes any sense. Then I was able to take the face off and put the two screws back in (lock tite this time). Then if your needle has fallen off, make sure you plug in the tach and turn your bike on before you press the needle back in place, because otherwise your tach will not read zero when you turn it on. Then I JB welded the face back on. I made the mistake of pressing the needle on and then JB welding it, and then plugging it in, and when I turned the bike on I was stuck at 3000rpm. I hope this all makes sense.