Suzuki Boulevard M50 User Manual

3-30 ENGINE
CAM CHAIN TENSIONER AND GUIDE
CAM CHAIN TENSIONER
For driving the camshafts, two cam chain tensioners are used
on the respective cam drive chains. Unlock the ratchet mecha-
nism, and move the push rod in place to see if it slides smoothly.
If any stickiness is noted or ratchet mechanism is faulty, replace
the cam chain tensioner assembly with a new one.
The cam chain tensioner can be distinguished by the embossed
letters, “F” and “R”, on the cam chain tensioners.
“F”: Front (No. 2) cam chain tensioner
“R”: Rear (No. 1) cam chain tensioner
CAM CHAIN GUIDE
Check the contacting surface of the cam chain guide for wear
and damage. If it is found to be damaged, replace it with a new
one.
Two kinds of cam chain guide are used on the respective cam
drive chains.
1: For front cylinder
2: For rear cylinder
CYLINDER HEAD
VALVE AND VALVE SPRING DISASSEMBLY
• Using special tools, compress the valve springs and remove
the two cotter halves 1 from valve stem.
 09916-14510: Valve spring compressor
09916-14910: Valve spring compressor attachment
09916-84511: Tweezers
• Remove the valve spring retainer 2, inner spring 3 and outer
spring 4.
“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)