CDI resistor

Anyone have any idea of the correct specs for the resistor marked as R30 on a denso 3vd-82305-00 CDI unit? Anyone got the electrical diagrams for this unit? It's a yamaha motorbike ingnition unit. Resistor R30 got burnt beyond recognition and I can't find out it's value for replacement. Best I could figure out was that it seemed to have '189' written on the side, and I think it also said 1W. Anyone?

thanks