I have a Honda VFR400R Repsol Nc30, it idles but sound rough, front coil spark is strong, rear coil is weak, the pulse generator only reaches 0.7v instead of a minimum 1.8v, battery charges perfectly and increases charge when revving, what could be the problem, I hope its not an expensive issue, please Help Someone

How are you measuring the output voltage of the pulse generator? With the headlight off, what voltage do you measure across the battery at 5000 rpm?