Suzuki Boulevard M50 User Manual

7-12 COOLING AND LUBRICATION SYSTEM
THERMOSTAT
REMOVAL
• Drain engine coolant. (2-17)
• Remove the reservoir tank. (3-4)
• Remove the water hoses 1 and water pump case 2.
• Remove the thermostat case 3.
• Remove the thermostat 4.
INSPECTION
Inspect the thermostat pellet for signs of cracking.
Test the thermostat at the bench for control action, in the follow-
ing manner.
• Pass a string 1 between flange of thermostat 2, as shown.
• Immerse the thermostat in the water contained in a beaker, as
shown in the illustration. Note that the immersed thermostat is
in suspension. Heat the water 3 by placing the beaker on a
stove 4 and observe the rising temperature on a thermome-
ter 5.
• Read the thermometer just when opening the thermostat. This
reading, which is the temperature level at which the thermo-
stat valve begins to open, should satisfy the standard value.
 Thermostat valve opening temperature
Standard: Approx. 75 °C (167 °F)
SAMPLE

Suzuki Boulevard M50 Specifications

General

Compression Ratio	9.4:1
Fuel System	Fuel injection
Ignition	Electronic ignition (transistorized)
Transmission	5-speed constant mesh
Final Drive	Shaft drive
Front Suspension	Inverted telescopic, coil spring, oil damped
Front Tire	130/90-16M/C 67H, tubeless
Rear Tire	170/80-15M/C 77H, tubeless
Ground Clearance	140 mm (5.5 in)
Seat Height	700 mm (27.6 in)
Engine Type	4-stroke, liquid-cooled, V-twin
Bore x Stroke	83.0 mm x 74.4 mm
Rear Suspension	coil spring, oil damped
Front Brakes	Single hydraulic disc
Rear Brakes	Drum
Fuel Tank Capacity	15.5 L (4.1 US gal)
Wheelbase	1, 655 mm (65.2 in)