Hallo Sportsters,

I have bought me a Sigma BC 500 speedometer, to let it work i had to buy me the 710398 tachometer adapter. I have installed it al conform the instructions but it doesnt work. I cant get the callibration done in the right way. Who knows what kind of value i have to messure on my tester ? AMPS ? voltage ? or what ever. Please help me !!!

Danny