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ENGLISH
TECHNICAL DATA - ENGINE
Engine
FC 550/4
FE 550e/6
FE 650e/6
FS 650e/6
Design
Liquid-cooled, 1-cylinder 4-stroke Otto engine with balancer weight
Displacement
550 cm
3
644 cm
3
Bore/Stroke
100 / 70 mm
100 / 82 mm
Compression ratio
11,8:1
11,5:1
Keihin carburetor
FCR-MX 41
Fuel
unleaded fuel with at least RON 95 (USA = Premium RON 91)
Timing
4 valves controlled over rocker arm and 1 camshaft, camshaft drive with single chain
Valve diameter, intake
35 mm
Valve diameter, exhaust
30 mm
Valve clearance, intake, cold
0,12 mm
Valve clearance, exhaust, cold
0,12 mm
Crankcase bearing
2 roller bearings
Conrod bearing
needle bearing
Piston pin bearing
bronze bush
Piston
Light allow – forged
Piston rings
1 compression ring, 1 oil scraper ring
Engine lubrication
pressure lubrication with trochoid rotor pump
Engine oill
fully synthetic engine oil (Motorex Power Synt 4T SAE 10W50)
Quantity of engine oil
1,0 liter
Primary drive
straight-toothed spur wheels 29:78t
Clutch
multi-disk clutch in oil bath
Transmission (claw shifted)
4-speed
6-speed
Gear ratio
1st gear
14:33
14:33
2nd gear
17:30
17:30
3rd gear
19:26
19:26
4th gear
23:25
23:25
5th gear
–
24:22
6th gear
–
27:20
Ignition system
breakerless transitorized DC-CDI ignition system with digital ignition advance, type KOKUSAN
Generator
–
12V 150W
Spark plug
NGK DCPR 8 E
Electrode distance
0,6 mm
Cooling system
liquid cooled, permanent circulation of cooling liquid through water pump
Cooling liquid
1.0 liters, mixing ratio 40% antifreeze, 60% water,at least –25° C
Starting aid
kickstarter
kickstarter/electric starter
BASIC CARBURETOR SETTING
Type of carburetor
Keihin FCR-MX 41
Keihin FCR-MX 41
Keihin FCR-MX 41
Carburetor ID number
4125B
4125B
4138C
Main jet
182
182
160
Jet needle
OBDVR
OBDVT (OBDVR)
OBDVT (OBEKR)
Idling jet
40
38 (40)
38 (45)
Main air jet
200
200
200
Idle air jet
100
100
100
Needle position
5th from top
5th from top
2nd (6th) from top
Starting jet
85
85
85
Mixture control screw open
1,5
1,5
0,5 (1,5)
Slide
15
15
15
Restriction
–
slide stop
slide stop
Pump diaphragm stop
858 / 2,15 mm
858 / 2,15 mm
858 / 2,15 mm
Hot start knob
diameter 2,5 mm
diameter 2,5 mm
diameter 2,5 mm
FC 550/4
FE/FS 550e/6
EU/AUS/USA green
FE/FS 650e/6
EU/AUS/USA green
