Not clear whether ignition follows engine.why not keep gen 2 ignition and adapt wiring harness ?
Air Injection System, what you need is this: http://www.eaglemike.com/Air-injection-blockoff-kit-AIS.htmThe other question is the 09 head has a vent pipe which the 98 does not.
The Generation 1 stator has an exciter coil to power the Generation 1 CDI. The Generation 2 stator has NO exciter coil; thus . . . a Generation 2 FTBI (ignition) would be required for operation with the later stator.All you need to do is swap stator covers, or take guts from first and install into second....been there done that....works like a charm.:13: