Since I got my bike the starter has never seemed to want to spin fast enough to fire up the motor but it starts right away with the kicker. Put a meter on the starter terminal and ground and pushed the button. Meter read 7.5 volts. Is that normal? Is that just the starter draw dropping the voltage or is there something haywire here. Thanks in advance. '78 xs 15000 km on the clock, new rings cam chain, valve grind, runs great, charges to spec.