Holybro Kopis 2 with Arducopter Motor RPMs to high in armed mode

ArduCopter
1

Using a 4S battery the drone almost goes air born when switched to arm mode.
Holybro Kopis 2 standard version drone, flight controller replaced with Kakute F7 V1.5 and stock Kv2400 motors.
Motors start turning between 2 & 3% in motor test.
MOT_SPIN_ARM = 0
Drone loaded with Betaflight and INAV software had no high rpm problem using same radio.
PIDs were turned down no change
What changes are needed to reduce RPMs?

2

Read this,
https://ardupilot.org/copter/docs/set-motor-range.html

3

And have you followed these instructions
https://ardupilot.org/copter/docs/tuning-process-instructions.html

4

yes already read this material, in Arducopter 4 selections are fixed amounts did see any place to enter a custom %

5

Are you looking for this,
MOT_SPIN_MIN
MOT_SPIN_ARM
Also set your MOT_THRUST_EXPO

6

Late reply Updated to arducopter 4.3 and latest version of BLHeli 32, loaded BLHeli defaults settings. RPM Normal Thanks