I have an Aprilia sx 125 and the speedometer does not register, it will read 9 mph then flick up to 30 mph when only doing 5 mph, and then it will not register at all.It has been in the dealers for 2 weeks now and they only found this problem 2 days ago, they have tried numerous things like different cables, clocks @

Motorcycles - Aprilia - SX 125 - 2008 Aprilia SX 125