Mathew,
I know this might be a bit late but I thought I would put it, there are two types of internal rotor system you say yours measures 7 Ohms this is a straight line ignition with no maping the other measures 4.5 Ohms this has about 10 degrees of advance, this system was generally usde on 250cc engines.
Regards
Steve.
UK Motoplat.
I know this might be a bit late but I thought I would put it, there are two types of internal rotor system you say yours measures 7 Ohms this is a straight line ignition with no maping the other measures 4.5 Ohms this has about 10 degrees of advance, this system was generally usde on 250cc engines.
Regards
Steve.
UK Motoplat.