Just picked up my first trike. It's a 2012 HD Tri Glide. Riding it home I found the speedometer is off at 75 mph by about 10 miles and hour. Also the tach reads higher than my 2012 Ultra Limited. Talked to Harley and they said there is no speedometer adjustment and someone must have changed a pulley. Does anyone know what the rear drive pulley or the transmission pulley diameter or tooth count should be?