Polaris MATRIX INDY VR1 Series Owner's Manual page 162

MAINTENANCE
SPARK PLUG CONDITION
NORMAL PLUG
The normal insulator tip is gray, tan or light brown. There will be few combustion
deposits. The electrodes are not burned or eroded. This indicates the proper
type and heat range for the engine and the service.
TIP
The tip should not be white. A white insulator tip indicates overheating, caused
by use of an improper spark plug or incorrect carburetor/throttle body
adjustments.
WET FOULED PLUG
The wet fouled insulator tip is black. A damp oil film covers the firing end. There
may be a carbon layer over the entire nose. Generally, the electrodes are not
worn. General causes of fouling are excessive oil or use of non-recommended
injection oil.
COOLING SYSTEM
COOLANT
POLARIS recommends the use of POLARIS Antifreeze 50/50 Premix. This
antifreeze is already premixed and ready to use. Do not dilute with water. If the
vehicle will be stored or operated at extremely low temperatures, greater
protection may be required. An authorized dealer can assist.
To ensure that the coolant maintains its ability to protect the engine, we
recommend that the system be completely drained every five (5) years and
refreshed with Antifreeze 50/50 Premix.
Any time the cooling system has been drained for maintenance or repair,
replace the coolant with fresh Antifreeze 50/50 Premix.
NOTICE
If coolant flow becomes restricted or plugged, coolant loss, air lock, or engine
damage may result.
COOLANT LEVEL
The engine coolant level is controlled by the recovery system. The recovery
system components are:
• Coolant bottle/overflow tank
• Pressure cap
• Connecting hoses
• In-bottle Thermostat
160