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Triumph Shift Assist System (if fitted)
System Description
The Triumph Shift Assist (TSA) system enables the rider to change gears without the use
of the clutch. The system uses signals from the Shift Force Sensor (if fitted) (located on
the gear change linkage) and the Gear Position Sensor to detect when a shift force is
applied to the gear change pedal. Engine torque is then adjusted to facilitate a smooth,
clutch free gear change.
System Operation
• The Triumph shift assist system allows clutch free shifts for the majority of gear
changes. However, it is recommended that the clutch is used for gear changes at
slow riding speeds, or when riding in slow traffic.
• The clutch must be used when selecting any gear from neutral, and also when
selecting neutral from any other gear.
• To ensure a smooth gear change, use a positive pedal force to select the next gear
then release the pedal. Do not hold the pedal in its upper or lower positions.
• Clutch free Up shifts are disabled by the system at engine speeds lower than 1,500
revolutions per minute (rpm) to prevent stalling.
• At maximum engine speeds, clutch free up shifts are allowed by the system, but
clutch free down shifts are disabled to prevent engine over speed.
• The Triumph shift assist system is disabled if the motorcycle is traveling at its limited
top speed. The system is automatically re-enabled when the motorcycle slows down
from its limited top speed.
• Engine torque is reduced when changing gear at high engine loads.
• A throttle 'blip' is applied when changing gear at low engine loads.
• Engine torque is returned to normal control when the gear change is complete.
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