12. COOLING SYSTEM DINK50/ 125
SPECIFICATIONS
Radiator cap relief pressure 90 kPa (0.9 kgf/cm2, 12.8 psi)
Begins to open 80 - 82°C (176 - 180°F)
Thermostat temperature Full-open 90°C (198°F)
Valve lift 3.5 mm (0.14 in) minimum
Coolant capacity Radiator and engine 1 liter (1.1 US qt, 0.88 lmp qt)
Reserve tank 0.37 liter (0.4 US qt, 0.33 lmp qt)
Standard coolant concentration 1:1 mixture with soft water
COOLANT GRAVITY
Temp.
Coolant 0 5 10 15 20 25 30 35 40 45 50
concentration
5% 1.009 1.009 1.008 1.008 1.007 1.006 1.005 1.003 1.001 0.009 0.997
10% 1.018 1.107 1.017 1.016 1.015 1.014 0.013 1.011 1.009 1.007 1.005
15% 1.028 1.027 1.026 1.025 1.024 1.022 1.020 1.018 1.016 1.014 1.012
20% 1.036 1.035 1.034 1.033 1.031 1.029 1.027 1.025 1.023 1.021 1.019
25% 1.045 1.044 1.043 1.042 1.040 1.038 1.036 1.034 1.031 1.028 1.025
30% 1.053 1.051 1.051 1.049 1.047 1.045 1.043 1.041 1.038 1.035 1.032
35% 1.063 1.062 1.060 1.058 1.056 1.054 1.052 1.049 1.046 1.043 1.040
40% 1.072 1.070 1.068 1.066 1.064 1.062 1.059 1.056 1.053 1.050 1.047
45% 1.080 1.078 1.076 1.074 1.072 1.069 1.056 1.063 1.062 1.057 1.054
50% 1.086 1.084 1.082 1.080 1.077 1.074 1.071 1.068 1.065 1.062 1.059
55% 1.095 1.093 1.091 1.088 1.085 1.082 1.079 1.076 1.073 1.070 1.067
60% 1.100 1.098 1.095 1.092 1.089 1.086 1.083 1.080 1.077 1.074 1.071
COOLANT MIXTURE (WITH ANTI-RUST AND ANTI-FREEZING EFFECTS)
Freezing Point Mixing Rate KYMCO SIGMA Coolant Concentrate Distilled Water
-9 20%
-15 30% 425cc 975cc
-25 40%
-37 50%
-44.5 55%
Cautions for Using Coolant:
· Use coolant of specified mixing rate. (The mixing rate of 425cc KYMCO SIGMA coolant
concentrate + 975cc distilled water is 30%.)
· Do not mix coolant concentrate of different brands.
· Do not drink the coolant which is poisonous.
· The freezing point of coolant mixture shall be 5lower than the freezing point of the riding
area.
12-3
