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GENERALITÀ
GENERAL
DRAFT
BOZZA
NOTES GENERALES
ALLGEMEINES
GENERALIDADES
ENGINE
4-stroke, single cylinder
Bore (250)...........................................................................2.99 in.
Bore (400)...........................................................................3.6 in.
Bore (450- 510)................................................................. 3.81 in.
Stroke (250) ...................................................................... 2.17 in.
Stroke (400-450).............................................................. 2.39 in.
Stroke (510)....................................................................... 2.67 in.
Displacement (250)......................................................... 15.22 cu. in.
Displacement (400)......................................................... 24.37 cu. in.
Displacement (450)......................................................... 27.39 cu. in.
Displacement (510)......................................................... 30.56 cu. in.
Compression ratio (250- 510)...................................... 12,5:1
Compression ratio (400-450) ...................................... 12:1
TIMING SYSTEM
Double overhead camshaft; 4 valves
Valve angle in relation to cylinder:
INLET ................................................................................. 12°
EXHAUST .......................................................................... 13°
Valve clearance with cold engine
INLET................................................................................... 0.004-0.006 in.
EXHAUST............................................................................ 0.006-0.008 in.
FUEL FEED
Gravity
Dry type air filter

CARBURETOR

Type (TE 250) ................................................................... "Mikuni" TMR 36 with acceleration pump and T.P.S. (Throttle Position Sensor)
Type (TC 250-SM 400 R)................................................ "Mikuni" TMR 38 with acceleration pump and T.P.S. (Throttle Position Sensor)
Type (450-510).................................................................. "Mikuni" TMR 41 with acceleration pump and T.P.S. (Throttle Position Sensor)
LUBRICATION
Type..................................................................................... Dry sump with two oil pump rotors and cartridge filter
COOLING
By fluid with double cooler
IGNITION
Electronic with capacitive discharge; Digital controlled variable spark advance
Spark plug type ................................................................. "NGK" CR8EB
Spark plug gap ................................................................. 0.027 in.
STARTING... ...................................................................... electric (with automatic decompressor)
Part. N. 8000 A2925 (03-2004)
A.5

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