Suzuki Boulevard M50 User Manual

PERIODIC MAINTENANCE 2-7
SPARK PLUG AND PLUG CAP INSTALLATION
• Install the spark plugs to the cylinder heads by finger tight,
and then tighten them to the specified torque.
 Spark plug: 11 N·m (1.1 kgf-m, 8.0 lb-ft)

• Install the spark plug caps.
VALVE CLEARANCE
Valve clearance must be checked and adjusted when:
(1) the valve mechanism is service, and
(2) the camshafts are serviced.
Check and adjust the clearance to the specification.
 Valve clearance (when cold):
IN. 0.08 – 0.13 mm (0.003 – 0.005 in)
EX. 0.17 – 0.22 mm (0.007 – 0.009 in)
NOTE:
* The clearance specification is for COLD state.
* Both intake and exhaust valves must be checked and adjusted
when the piston is at Top Dead Center (TDC) of the compres-
sion stroke.
• Remove the rear and front seats. (8-3)
• Remove the fuel tank. (6-3)
• Remove the right frame cover. (8-4)
• Remove the spark plug caps.
• Loosen the inlet pipe screws.
When installing a spark plug, carefully turn the spark
plug wrench by finger into the threads of the cylinder
head to prevent damage the aluminum threads.
Inspect initially at 1 000 km (600 miles, 2 months) and
every 12 000 km (7 500 miles, 24 months) thereafter.
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)