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Model: 638

MANUFACTURED BY:
SOLO KLEINMOTOREN GmbH
STUTTGART, GERMANY
SERIES OR ASSEMBLY NUMBER:
638AVK
YEAR INTRODUCED:
1984
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
38cc (2.32 cu. in.)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
42mm (1.653 in.)
PISTON STROKE:
28mm (1.102 in.)
PISTON RING THICKNESS:
CYLINDER TYPE:
Chrome plated aluminum
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
WEIGHT:
5.5kg (12 lbs.) with 35cm (14 in.) bar & chain
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Anti-vibration
CHAIN BRAKE:
Mechanical
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast magnesium
MAGNETO TYPE:
Electronic
CARBURETOR:
Walbro HDC-10
MAJOR REPAIR KIT:
MINOR REPAIR KIT:
AIR FILTER SYSTEM:
Nylon mesh element
STARTER TYPE:
SOLO automatic rewind
OIL PUMP:
Automatic, gear driven piston pump
MAXIMUM ENGINE RPM:
IDLE RPM:
IGNITION TIMING:
fixed
BREAKER POINT SETTING:
none
FLYWHEEL/COIL AIR GAP:
0.25 mm (0.010 in.)
SPARK PLUG TYPE:
Bosch WKA175T6, Champion RCJ6
SPARK PLUG GAP:
0.5 mm (0.020 in.)
CRANKSHAFT MAIN BEARINGS:
Caged needle roller
FUEL TANK CAPACITY:
FUEL OIL RATIO:
40:1
RECOMMENDED FUEL OCTANE:
Regular grade
MIX OIL SPECIFICATION:
SOLO mix oil
CHAIN PITCH:
3/8 in. low profile
CHAIN TYPE:
Oregon 91SG
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
35cm (14 in.)
LONGEST GUIDE BAR SUPPLIED:
40cm (16 in.)
COLOUR SCHEME:
SOLO Red and Black
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:



 

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