Suzuki Boulevard M50 User Manual

3-28 ENGINE
REASSEMBLY
• Apply SUZUKI MOLY PASTE to the rocker arms and their
shafts.
 99000-25140: SUZUKI MOLY PASTE
 Rocker arm shaft: 27 N·m (2.7 kgf-m, 19.5 lb-ft)
CAMSHAFT
The camshafts should be checked for wear and also for runout
of cams and journals if the engine has been noted to produce
abnormal noise or vibration or to lack output power. Any of these
malconditions could be caused by a worn camshafts.
The camshaft can be distinguished by the embossed-letters, “F”
and “R”, on the camshaft.
“F” : Front (No. 2) camshaft
“R” : Rear (No. 1) camshaft
CAMSHAFT CAM WEAR
Worn-down cams are often the cause of mistimed valve opera-
tion resulting in reduced output power. The limit of cam wear is
specified for both intake and exhaust cams in terms of cam
height H, which is to be measured with a micrometer. Replace
camshafts if found worn down to the limit.
 Cam height H
Service Limit: (IN.) : 35.20 mm (1.386 in)
(EX.): 36.28 mm (1.428 in)
 09900-20202: Micrometer (25 – 50 mm)
“R”
“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)