Suzuki Boulevard M50 User Manual

3-40 ENGINE
CYLINDER
CYLINDER DISTORTION
Check the gasketed surface of the cylinder for distortion with a
straightedge and thickness gauge, taking a clearance reading at
several places as indicated. If the largest reading at any position
of the straightedge exceeds the limit, replace the cylinder.
 Cylinder distortion
Service Limit: 0.05 mm (0.002 in)
 09900-20803: Thickness gauge
CYLINDER BORE
Measure the cylinder bore diameter at six places. If any one of
the measurements exceeds the limit, overhaul the cylinder and
replace the piston with an oversize, or replace the cylinder.
Once the reboring is done on any one cylinder which measure-
ments is beyond the limit, the remaining cylinders must be also
rebored accordingly. Otherwise the imbalance might cause
excess vibration.
 Cylinder bore
Service Limit: 83.085 mm (3.2711 in)
 09900-20508: Cylinder gauge set
NOTE:
When installing the water union to the cylinder, apply grease to
the new O-rings.
 99000-25030: SUZUKI SUPER GREASE “A” (USA)
99000-25010: SUZUKI SUPER GREASE “A” (Others)
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)