Triumph Thunderbird User Manual

81
Maintenance and Adjustment
Final Drive Belt Tension Inspection
Drive belt tension must be measured using
Triumph service tool T3880126, which is
available from your Triumph dealer.
Service Tool T3880126
1. Load scale - 4.5 kgf (10 lbf) mark
2. O-ring
3. Deflection slider
4. Deflection scale (0.5 mm (0.020 in)
increments)
5. O-ring
6. Belt cradle
7. Load scale (zero position)
Drive belt tension can be measured with the
motorcycle on the side stand, or if available,
on support stand T3880803 (available from
your Triumph dealer). The method of
measurement and adjustment is identical, but
the belt tension specification for each method
is different.
Drive belt tension must be measured with
the drive belt cold (at ambient tempertaure).
Drive Belt Tension Specification
Drive belt tension is measured by applying a
4.5 kilogram-force (kgf) (10 pound-force (lbf))
load to the plunger on service tool T3880126,
once it has been positioned to the lower run
of drive belt; this load then deflects the belt.
The belt deflection can then be measured
using a scale on the tool.
1. 4.5 kilogram-force (10 pound-force)
applied to belt
2. Amount of deflection
5
4
7
1
3
2
6
cfhc
Motorcycle on
sidestand
5.5 to 7.0 mm
(0.20 to 0.27 in)
Motorcycle on Support
stand T3880803
7.5 to 9.0 mm
(0.30 to 0.35 in)
1
2

Triumph Thunderbird Specifications

General

Manufacturer	Triumph
Displacement	1699 cc
Bore x Stroke	107.1 mm x 94.3 mm
Compression Ratio	9.7:1
Clutch	Wet, multi-plate
Gearbox	6-speed
Frame	Tubular steel, twin spine
Front Tyre	120/70 R19
Rear Tyre	200/50 R17
Seat Height	700 mm
Fuel System	Fuel injection
Final Drive	Belt
Front Suspension	Telescopic forks
Rear Suspension	Twin shocks, adjustable preload
Front Brakes	Twin 310mm floating discs
Rear Brakes	Brembo 2-piston caliper
Fuel Tank Capacity	22 L
Power	97 hp (72 kW) @ 5900 rpm