Triumph Thunderbird Commander Handbook page 94

Maintenance and Adjustment
• Remove the tool, taking care not to
move the O-ring or deflection slider, and
read the belt deflection on the scale on
the tool. The belt deflection is the gap
between the top of deflection slider and
the lower edge of the O-ring. The
increments on the scale are 0.5 mm
(0.020 in) apart.
3
2
1. Belt deflection
2. Scale
3. Deflection slider
4. O-ring
• Repeat the measurement at several
points around the drive belt to locate its
tightest point. Always adjust drive belt
tension at the tightest point in the drive
belt.
94
If the drive belt deflection is outside the limits
given below, the drive belt must be adjusted
(see page 95).
Drive Belt Tension Specification
Motorcycle on
sidestand
Motorcycle on Support
stand T3880803
4
1
5.5 to 7.0 mm
(0.20 to 0.27 in)
7.5 to 9.0 mm
(0.30 to 0.35 in)