Ok, so that last four or five times I have gone out riding I have noticed that my tach some times reads zero. I haven't actually had a chance to see it drop, but I will glance down and it reads zero and then glance down again and it will register something. Any ideas what the problem could be. It hasn't happened when I have started up the bike and just let it sit, only when I am out riding.

 

Loose connection some where would be my guess.