i was wrong the new battery didnt fix it, it still dones it when i ride it. so i tried the 9v battery idea and it does the same thing, rev it up and it resets. i had these for 2 years and no problems, the only thing i have changed since, is i advanced my timing on both bikes 4 degrees. i wonder if changing the timing does something to it? im totaly dissconected from the systems power, so if i took care of that issue maybe its a vibration problem after all? watever it is its annoying, im leaving on a trip tomorrow for a week and its gonna suck if i cant use it at all for temp readings or tach. products are just turing to crap, not much testing in certain feilds that should be done. like this for instance