The N2O upper RPM limit is set using this procedure.
Step 1: With the key off, select the desired upper RPM from the following table.
Step 2: Set Spark Base to 8, set mode to off off off ON.
Step 3: Turn the key ON.
The Red LED will illuminate for 10 sec while the unit reconfigures.
The unit then reboots itself (Both LED's light for 1 sec)
Step 4: Reset the switches as desired. Configuration is complete.