the speedometer on my tomos gold bullet TTLX is messed up, up until about 30mph it reads fine, then when i get around 35, it DROPS down to about 20-25 suddenly and sits there wiggling around. ive replaced the cable and drive unit, so i know its gotta be somthin with the guage itself, is somthin worn out in there? the bike only has 1887Km on it, so i find this hard to believe. by the way, the speeds are in MPH, but the odometer on tomos bikes reads in Kilometers. unless these speedometers are total crap (which wouldnt surprise me) what the F*$& is wrong with it?