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Model: 641

MANUFACTURED BY:
SOLO KLEINMOTOREN GmbH
STUTTGART, GERMANY
SERIES OR ASSEMBLY NUMBER:
YEAR INTRODUCED:
1986
YEAR DISCONTINUED:
1993
ENGINE DISPLACEMENT:
41.5cc (2.53 cu. in.)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
42mm (1.65 in.)
PISTON STROKE:
30mm (1.18 in.)
PISTON RING THICKNESS:
CYLINDER TYPE:
Aluminum with Nikasil coating
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
2.7 (2.0 kW)
WEIGHT:
4.5 kg (9.9 lbs.), powerhead only
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Anti-vibration
CHAIN BRAKE:
Yes
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast magnesium, injection molded plastic
MAGNETO TYPE:
Electronic
CARBURETOR:
Bing 48C-104B
MAJOR REPAIR KIT:
MINOR REPAIR KIT:
AIR FILTER SYSTEM:
Cellulose fiber element
STARTER TYPE:
Automatic rewind
OIL PUMP:
Automatic
MAXIMUM ENGINE RPM:
IDLE RPM:
IGNITION TIMING:
fixed
BREAKER POINT SETTING:
none
FLYWHEEL/COIL AIR GAP:
0.25 to 0.30 mm (0.009 to 0.011 in.)
SPARK PLUG TYPE:
Bosch WSR6F, Champion RCJ6Y
SPARK PLUG GAP:
0.50 mm (0.020 in.)
CRANKSHAFT MAIN BEARINGS:
Caged needle roller
FUEL TANK CAPACITY:
470 ml (16 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:
45 cm (18 in.)
COLOUR SCHEME:
SOLO Red and Black
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:



 

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