The ECM does the following as the temperature rises or continues to rise, in this order:
1.Richen fuel mixture both cylinders
2.Start firing only every other firing stroke, every other cylinder
3.Start firing rear cylinder every three firing strokes
4.Completely stop firing rear cylinder.
Mine is an 08 Rocker, dont know when the ECM and fuel injection was started to be installed. It has to be a year or model that has fuel injection, as a carb cannot be stopped flowing fuel for one stroke.
The super tuner software manual give complete descriptions of the process. i may not be exactly correct, but it is close as i remember.
the first time mine did it, i was about to croak! a bike with 150 miles on it and now it was "missing". BUT just move the throttle and the beast comes back on line just like it never happened.
Pat in Tennessee

2008 Rocker C- FXCWC
SE Stage II 103 Cu. In. Big Bore Kit (1690 cc) 3-7/8”
SE Pro 4-3/8” Stroker Flywheel and Rod Assy.
SE 10-1/2:1 Flat Top Pistons
SE Pro 58mm EFI Throttle Body
SE 255 Cam (Torque)
SE Roller Rocker Arms
SE Roller Tappets
SE Valve Spring Kit
SE ST Spark Plugs
SE 10mm Spark Plug Wires
SE Pro Tuner Kit
Vance and Hines Big Radius Exhaust
SE Stage 1 Air Cleaner Kit
SE Hi Flow Billet Air Cleaner with 103 Medallion
FXCW Luggage Rack Kit (Now Chrome Plated)
FXCW Seat
Mustang Sissy bar Pad (VSRC)
Custom Fabricated Sissy Bar (polished stainless steel)
H-D Flames Footpegs
H-D Chrome Voltage Regulator Cover
Custom Stainless 1” Tank Lift
Kuryakin ISO Grips
Comagination Head Light Modulator
Scorpio SR-i901 Active Security System
H-D Windshield
H-D Chrome Shift Rod Kit