Triumph Thunderbird Service Manual page 401

Final Drive
1. Drive belt
2. Belt cradle
3. Deflection slider
4. O-ring
S. Drive belt lower cover
5. Taking care not to deflect the belt, slide the
deflection slider and its a-ring upwards until the
slider just touches the belt cover.
1. Belt deflection
2. Scale
3. Deflection slider
4. O-ring
9. 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.
If the drive belt deflection is outside the limits given below,
the drive belt must be adjusted (see page
8>.
Z Remove the tool, taking care not to move the a-ring
or deflection slider, and read the belt deflection on
the scale on the tool.
8. The belt deflection is the gap between the top of
deflection slider and the lower edge of the a-ring.
The increments on the scale are 0.5 mm <0.020 in)
apart.
Drive Belt Tension Specification
Motorcycle on sidestand
55 to ZO mm
<0.20 to 0.27 in)
Motorcycle on Support stand
Z5 to 9.0 mm
13880803
<0.30 to 0.35 in)
~
3
dho
6. Apply force to the belt tension gauge in an upwards
direction, until the 4.5 kgf <10Ibf> mark on the load
scale is reached. The deflection slider must remain
stationary against the belt cover while the force is
applied.
1. Drive belt
2. Scale
3. Drive belt lower cover
4. Load scale
SelVice Manual - Thunderbird
15.7