Suzuki Boulevard M50 User Manual

SERVICING INFORMATION 10-43
SERVICE DATA
VALVE + GUIDE Unit: mm (in)
ITEM STANDARD LIMIT
Valve diam.
IN.
30
(1.18)
—
EX.
26
(1.02)
—
Valve clearance (when cold)
IN.
0.08 – 0.13
(0.003 – 0.005)
—
EX.
0.17 – 0.22
(0.007 – 0.009)
—
Valve guide to valve stem
clearance
IN.
0.010 – 0.037
(0.0004 – 0.0015)
—
EX.
0.030 – 0.057
(0.0012 – 0.0022)
—
Valve guide I.D.
IN. & EX.
5.500 – 5.512
(0.2165 – 0.2170)
—
Valve stem O.D.
IN.
5.475 – 5.490
(0.2156 – 0.2161)
—
EX.
5.455 – 5.470
(0.2148 – 0.2154)
—
Valve stem deflection
IN. & EX. —
0.35
(0.014)
Valve stem runout
IN. & EX. —
0.05
(0.002)
Valve head thickness
IN. & EX. —
0.5
(0.02)
Valve stem end length
IN. & EX. —
3.1
(0.12)
Valve seat width
IN. & EX.
0.9 – 1.1
(0.035 – 0.043)
—
Valve head radial runout
IN. & EX. —
0.03
(0.001)
Valve spring free length
INNER —
38.3
(1.51)
OUTER —
40.1
(1.58)
Valve spring tension
INNER
64 – 73 N
(6.51 – 7.49 kgf, 14.35 – 16.51 lbs)
at length 32.5 mm (1.28 in)
—
OUTER
119 – 136 N
(12.09 – 13.91 kgf, 26.65 – 30.67 lbs)
at length 36.0 mm (1.42 in)
—
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)