6 - 6
Remove:
• Right-side
bodywork
, see the section in Chapter 4 entitled
“front bodywork”.
•
screws (3) Fig. A
•
thermostat (4) Fig. B
NOTE:_________________________________
Drain out the coolant before proceeding with these opera-
tions.
Check:
•
The by-pass port (A)
If clogged, replace.
• Thermostat
(4)
If this does not open at 75° ~ 90° C (167~ 194° F), replace, Fig.
B.
Thermostat check
1. Immerse the thermostat in a container fi lled with water Fig.
D.
2. Slowly heat the water.
3. Immerse a thermometer in the water.
4. Mix the water again, keeping an eye on the thermostat and
on the temperature shown on the thermometer.
5. When the water reaches a temperature of 75°C, the thermo-
stat valve will start to open, reaching a temperature of 90°C.
The thermostat valve reaches an opening of 7 mm.
Key to Fig. D:
1. Thermometer
2. Container
3. Water
4. Thermostat
Thermostat opening/closure chart Fig. E
A. Fully
closed
B. Fully
open
IMPORTANT NOTICE
If there are any doubts about the precision of the thermostat, it
should be replaced. A faulty thermostat can cause notable over-
heating or overcooling.
A
3
C
A
4
D
1
3
4
2
A
B
75°C (167°F)
90°C (194°F)
temperatura
0
7
aper
tura (mm, in)
E
THERMOSTAT
THERMOSTAT REMOVAL
4
B
temperature
opening (mm, in)
COPY - Moto GB - Grant Martland - grantmartland@motogb.co.uk
Summary of Contents for TRK 502
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