Mike420

I got a 03 vinson 500 that when am riding an go from 2 to 3 the 3 gear indicator on the cluster goes blank an its like it hit the rev limiter really quick put I go to 4 an it showed up on the cluster but 5 don't an its fall flat on it face for a min then picks back up power an then fallen again anyone know y its doing this it has to be a s Sensor or something I would think it only does it some time it will work then sometime it won't idk plz help