My sensor doesn't always detect my gear changes so there are times when I am expecting the motor to cut out but it doesn't and the result makes me wince. Is there something I can do to increase the sensitivity? I am using a ten gear cassette and wondered if there was not enough movement of the cable sometimes. It seems always to cut out on the double downshifts. It is mounted up next to the gear changer by the handlebars to keep it away from mud and dust.