Did you ever resolve your RPM issue? I am having the same problem with a K 80G that will only go up to 141 Max RPM setting in the ECU. The engine is only a year and a half old just purchased used. I have a new K 80G purchased in May of this year, that does go up to 145K setting in the ECU.

I Called Barry this morning and he told me he would not program the ECU to reach 145K because of safety issues. Barry also told me K 80's are 80N class turbines which equates to only 17.89lb of thrust which is just shy of 18lbs.

The specifications clearly state Thrust: 8618 g @ 21.1° C. (19 lb. @ 70° F. )

Is Kingtech representing K80 series engines as 19 lb thrust engines, when they are really 17 lb thrust engines? If this is the case we have a serious problem with them not being truly honest or sincere by providing consumers with false information. It clearly states in the owners manual and the Kingtech website the K 80 as a 19 lb thrust engine.