Throttle Control Sensor System on 2003 Triumph Tiger 955i

The issue:  The Tiger stalls occasionally on idle.  Sometimes it seems to hold regular idle around 1000rpm, other times it drops down to 3-400 RPM on the verge of stalling and if I give it gas it cuts out.  It always restarts.


What I’ve done so far:  replaced the fuel filter and spark plugs.


Next target:  The idle stepper motor:


MOTOR, STEPPER, ISCV T1240888              $123.61
O-RING T3600037                                            $1.37
HOUSING,ISCV,3 CYL T1241064                  $42.79
GROMMET, ISCV T1241063                           $3.84
TUBE,CORRUGATED,200MM T1242502
2000MM                                                            $18.45
TUBE,CORRUGATED,145MM T1242501
145MM LONG                                                  $18.45


$208.51US = $281.34CAD
From Bikebandit’s online parts diagrams: www.bikebandit.com/oem-parts/2003-triumph-tiger-955i/o/m121594#sch565827


Visual inspection: Gasket (#4 on diagram) is partially squashed, may not be sealing.  One of the pipes was loose going into the back of the unit.

Next step:  remove the gas tank (again) and remove the entire throttle control/idling system, including pipes, and inspect for breaks.  Replace pipes if damaged.  If no pipe damage evident, look into getting a new stepper motor from Inglis Cycle.

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