Triumph Thunderbird LT Owner's Handbook Manual page 127

Cooling
Coolant Type
Water/Coolant Ratio
Coolant Capacity
Thermostat Opens (nominal)
Fuel System
Type
Fuel Pump
Fuel Pressure
Fuel
Type
Tank Capacity
Ignition
Ignition System
Spark Plug
Gap
Thunderbird Commander and Thunderbird LT
Triumph HD4X Hybrid OAT coolant
50/50 (pre-mixed as supplied by Triumph)
2.55 litres (0.67 US gal)
82°C (179°F)
Sequential electronic fuel injection
Submerged electric
3.5 bar (50.7 psi)
91 RON unleaded
21.7 litres (5.73 US gal)
Digital electronic
NGK DPR6EA-9, 2 per cylinder
0.9 mm (0.035 in)
Specifications
127