Home | Chain Saws | Chain Saw Chain | Bar Mount Patterns | Carburetors | Manufacturers | Trademarks | Collectors | Bulletins | Events | Stolen Saws | Chain Saw Age Reprints | Newsletter | Marketplace | Parts Sources | Cartoons | Links | Your Host



Model: 640

MANUFACTURED BY:
SOLO KLEINMOTOREN GmbH
STUTTGART, GERMANY
SERIES OR ASSEMBLY NUMBER:
YEAR INTRODUCED:
YEAR DISCONTINUED:
1971
ENGINE DISPLACEMENT:
67cc (4.1 cu. in.)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
50mm (1.968 in.)
PISTON STROKE:
34mm (1.338 in.)
PISTON RING THICKNESS:
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
4 DIN
WEIGHT:
6.5kg with 40cm bar & chain
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Rigid
CHAIN BRAKE:
none
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast magnesium
MAGNETO TYPE:
Bosch
CARBURETOR:
Tillotson HS-52A
MAJOR REPAIR KIT:
RK-23HS
MINOR REPAIR KIT:
DG-5HS/T
AIR FILTER SYSTEM:
STARTER TYPE:
Solo automatic rewind
OIL PUMP:
Automatic
MAXIMUM ENGINE RPM:
7,000
IDLE RPM:
IGNITION TIMING:
Position is fixed
BREAKER POINT SETTING:
0.4 mm (0.016 in.)
FLYWHEEL/COIL AIR GAP:
position is fixed
SPARK PLUG TYPE:
Champion J8J
SPARK PLUG GAP:
0.025 in.
CRANKSHAFT MAIN BEARINGS:
Ball on flywheel end, caged needle roller on clutch end
FUEL TANK CAPACITY:
600ml
FUEL OIL RATIO:
25:1 after break in period of 20:1
RECOMMENDED FUEL OCTANE:
Regular grade
MIX OIL SPECIFICATION:
Two-cycle mix oil
CHAIN PITCH:
3/8 in.
CHAIN TYPE:
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
35cm (14 in.)
LONGEST GUIDE BAR SUPPLIED:
60cm (24 in.)
COLOUR SCHEME:
White with red accents
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:


Photographs courtesy George Blake collection
 

Reproduction of this World Wide Web Site in whole or in part is prohibited without permission.
Copyright © 2000-2020 MIKE ACRES - All rights are reserved.