Hunting rpm

[HillCountryRider_imp]

I read through this entire thread and believe the rpm increase during warm up is normal, especially during cool temperatures. The ECU will rev up engine when cold to reach a specified catalytic converter temperature during open loop. Once temperature is reached, the lambda sensor will signal to the ECU to go into closed loop ( normal idle rpm). If you are near the threshold for closed loop and ride off, the catalytic converter will cool off enough to go back into open loop. I have seen this happen on several vehicles, especially on cold mornings. A motorcycle has its catalytic converter exposed to air cooling.