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Model: 644SP

MANUFACTURED BY:
SOLO KLEINMOTOREN GmbH
STUTTGART, GERMANY
SERIES OR ASSEMBLY NUMBER:
SERIAL NUMBER PREFIX:
YEAR INTRODUCED:
1989
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
44.3cc
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
42mm (1.65 in.)
PISTON STROKE:
32mm (1.26 in.)
PISTON RING THICKNESS:
CYLINDER TYPE:
Aluminum with Nikasil coating
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
3.1 (2.3 kW)
WEIGHT:
4.39 kg (9.7 lbs.), powerhead only
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Anti-vibration
CHAIN BRAKE:
Inertia activated
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast magnesium, injection molded plastic
MAGNETO TYPE:
Electronic
CARBURETOR:
Walbro HDA-74 or ZAMA C3A-G1
MAJOR REPAIR KIT:
MINOR REPAIR KIT:
AIR FILTER SYSTEM:
Nylon mesh cartridge
STARTER TYPE:
Automatic rewind
OIL PUMP:
Automatic, gear driven
MAXIMUM ENGINE RPM:
IDLE RPM:
IGNITION TIMING:
fixed
BREAKER POINT SETTING:
none
FLYWHEEL/COIL AIR GAP:
0.2 to 0.3 mm (0.008 to 0.012 in.)
SPARK PLUG TYPE:
Bosch WSR6F, Champion RCJ6Y
SPARK PLUG GAP:
0.50 mm (0.020 in.)
CRANKSHAFT MAIN BEARINGS:
Ball
FUEL TANK CAPACITY:
662 ml (22.4 fl. oz.)
FUEL OIL RATIO:
40:1
RECOMMENDED FUEL OCTANE:
Regular grade
MIX OIL SPECIFICATION:
SOLO mix oil
CHAIN PITCH:
.325 in.
CHAIN TYPE:
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
40 cm (16 in.)
LONGEST GUIDE BAR SUPPLIED:
50 cm (20 in.)
COLOUR SCHEME:
Red with Black top cover
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:
Consumerized version of 644



 

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