I have a Diamond Digital Speedometer thats on the fritz. At idle the tach jumps around from 0 to 6000 RPM. Once the bike starts moving all the lights on it go beserk and flash on and off for a few seconds and then goes dead. The guy I bought this from is no help. One of those people that once he has your money then he has no more use for you. Anyone know of a repair shop that might be able to fix this for me?