Cooling System; Coolant Level Inspection - Triumph Street Cup Owner's Handbook Manual

Maintenance and Adjustment

Cooling System

To ensure efficient engine cooling, check
the coolant level each day before riding
the motorcycle, and top off the coolant
if the level is low.
Note:
• A year round, Hybrid Organic Acid
Technology (known as Hybrid OAT or
HOAT) coolant is installed in the
cooling system when the motorcycle
leaves the factory. It is colored
green, contains a 50% solution of
ethylene glycol based antifreeze,
and has a freezing point of -31°F
(-35°C).
Corrosion Inhibitors
Warning
HD4X Hybrid OAT coolant contains
corrosion inhibitors
suitable for aluminum engines and
radiators. Always use the coolant in
accordance with the instructions of
the manufacturer.
Coolant that contains anti-freeze and
corrosion inhibitors
chemicals that are harmful to the
human body. Never swallow antifreeze
or any of the motorcycle coolant.
94
and antifreeze
contains toxic
Note:
• HD4X Hybrid OAT coolant, as supplied
by Triumph, is premixed and does not
need to be diluted prior to filling or
topping off the cooling system.
To protect the cooling system from
corrosion, the use of corrosion inhibitor
chemicals in the coolant is essential.
If coolant containing
inhibitor is not used, the cooling system
will accumulate rust and scale in the
water jacket and radiator. This will block
the coolant passages, and considerably
reduce the efficiency of the cooling
system.

Coolant Level Inspection

Note:
• The coolant level should be checked
when the engine is cold (at room or
ambient temperature).
Street Cup, Street Twin,
Bonneville T100 and Bonneville T120
1
citr
1. Expansion tank cap
2. MAX and MIN marks
a corrosion
2