Suzuki Boulevard M50 User Manual

FUEL SYSTEM AND THROTTLE BODY 6-25
• After making sure that the steel ball stays steady at the center
line, disconnect the hose from the No. 1 throttle body vacuum
nipple and connect the next hose to this vacuum nipple.
• Turn air screw to bring the other steel ball 6 to the center
line.
The balancer gauge is now ready for use in balancing the throt-
tle valves.
Throttle valve synchronization
Using the vacuum balancer gauge, inspect the throttle valve
synchronization in the same manner of the digital vacuum tester.
Pay attention to the following points:
The vacuum gauge is positioned vertical level, and in this posi-
tion the two balls should be within one ball dia. If the difference
is larger than one ball, turn the balance adjusting screw on the
throttle body and bring the ball to the same level.
A correctly adjusted throttle valve synchronization has the balls
in the No. 1 and No. 2 at the same level.
 09913-13121: Vacuum balancer gauge
NOTE:
* During balancing the throttle valves, always set the engine
rpm at 1 100 rpm, using throttle stop screw.
* After balancing the two valves, set the idle rpm to 1 100 rpm
by the throttle stop screw.
THROTTLE POSITION SENSOR (TPS) SETTING
After all adjustments are completed, check or adjust the TPS
setting condition. (5-19)
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)