Cooling System; Coolant - Triumph Street Twin 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 up 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
motorcycle leaves the factory. It is
coloured green, contains a 50%
solution of ethylene glycol based
antifreeze, and has a freezing point
of -35°C (-31°F).
94
Corrosion Inhibitors
Note:
when the
To protect the cooling system from
corrosion, the use of corrosion inhibitor
chemicals in the coolant is essential.
If
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.
Warning
HD4X Hybrid OAT coolant contains
corrosion inhibitors
suitable for aluminium 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.
• HD4X Hybrid
supplied by Triumph, is premixed
and does not need to be diluted
prior to filling or topping up the
cooling system.

coolant

containing
and antifreeze
contains toxic
OAT coolant, as
a corrosion