Tuning help please 2010 FLHR
Symptoms of a Rich or Lean AFR
The tuner should be familiar with the symptoms of an overly rich or overly lean AFR. The symptoms are the signal to us that we have not achieved maximum performance – that we need to adjust the EFI.
Lean running symptoms
• Bike hesitates when throttle is increased
• Bike runs jerky or surges at steady throttle openings
• Engine detonates, (knocks) when accelerating
• Engine spits back or coughs through intake system
• Bike runs poorly when cold – engine runs better as it warms up to operating temperature
• Spark plug color is white
• Fuel consumption is abnormally low
Rich running symptoms
• Engine blubbers when throttle is increased
• Bike emits black exhaust smoke, (a little black exhaust smoke is normal when accelerating
hard or operating engine when cold)
• Engine blubbers at steady throttle
• Engine fouls spark plugs
• Bike runs well when cold – engine runs worse as it warms up to operating temperature
• Spark plug color is black
• Fuel consumption is abnormally high
If you increase the displacement by 10 inches, that will fatten up the AFR by approximately 1 AFR Point....
Volumetric Efficiency (VE) Front and Rear Cylinders – The VE Tables tell the ECM the air
flow efficiency of each cylinder in percent. This table charts VE percent vs. throttle position (TPS) and engine RPM. These tables can be adjusted independently, or in tandem.
o Increases raise the VE, implying there is more air entering the cylinder.
o Decreases lower the VE, implying there is less air entering the cylinder.
Lambda based calibrations have VE tables based on MAP and engine RPM.
TIP: If the VE table values are set at 125 or higher (max value of 127.5), you may want to change the engine displacement to allow the VE table adjustments to compensate for the increased air flow of the engine. Remember, if any engine parameters are changed, new recordings must be made before using the Smart tune function.
Symptoms of a Rich or Lean AFR
The tuner should be familiar with the symptoms of an overly rich or overly lean AFR. The symptoms are the signal to us that we have not achieved maximum performance that we need to adjust the EFI.
Lean running symptoms
Bike hesitates when throttle is increased
Bike runs jerky or surges at steady throttle openings
Engine detonates, (knocks) when accelerating
Engine spits back or coughs through intake system
Bike runs poorly when cold engine runs better as it warms up to operating temperature
Spark plug color is white
Fuel consumption is abnormally low
Rich running symptoms
Engine blubbers when throttle is increased
Bike emits black exhaust smoke, (a little black exhaust smoke is normal when accelerating
hard or operating engine when cold)
Engine blubbers at steady throttle
Engine fouls spark plugs
Bike runs well when cold engine runs worse as it warms up to operating temperature
Spark plug color is black
Fuel consumption is abnormally high
If you increase the displacement by 10 inches, that will fatten up the AFR by approximately 1 AFR Point....
Volumetric Efficiency (VE) Front and Rear Cylinders The VE Tables tell the ECM the air
flow efficiency of each cylinder in percent. This table charts VE percent vs. throttle position (TPS) and engine RPM. These tables can be adjusted independently, or in tandem.
o Increases raise the VE, implying there is more air entering the cylinder.
o Decreases lower the VE, implying there is less air entering the cylinder.
Lambda based calibrations have VE tables based on MAP and engine RPM.
TIP: If the VE table values are set at 125 or higher (max value of 127.5), you may want to change the engine displacement to allow the VE table adjustments to compensate for the increased air flow of the engine. Remember, if any engine parameters are changed, new recordings must be made before using the Smart tune function.








