Spark advancing of Kawasaki H2 part4 artifact?

[wetquartermile]

I is likely to be the fault of the timing light. Most are not made for high RPM, and are limited to 2000-3000 RPM on a 4 stroke engine.  There are high speed ones available, but even an 8000 rpm timing light is good for only 4000 on a 2-stroke. -Jim