I´ve always followed these forums and it´s always been helpful.im proud to join in on this will be the first time I get to ask a question.i ride a 99 trophy 1200 with alot of previous ower damage as in he never should have tried to work on it himself,the bike was in pieces when i got it,its running like a bat out of a fire,but this one thing stops me in my tracks,, my tachometer is not working,when its raining it will work a few miles at a time,how does this tachometer work