acting

I just got a 2000 900ss I.e.. And the tach is not working ....when I start the bike it immediately jumps to 3.5k When I start the bike the tach goes to 3.5 k...if I give it throttle it goes to 4K and never goes beyond, but when I go over I go over 80 to 100 mph it goes backwards ...as I give...

So today after work I was in my work's parking lot and put Sofia in 1st gear and she started to roll with a good amount of umph. I had the clutch lever all the way in yet the gear was engaged. As I was rolling forward in the parking lot I tried to put her back in N with the clutch lever in. No...