Suzuki - GS 425 EN 78

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Bike Info

CC:
425
Bike Description:
The title should be GS 425 and GS 425E models. These models was 1979 model year only, not 78-80.
GS 425 EN Parts and accessories

Service

Chain Freeplay mm:
0.6 - 0.8 INCH
Engine Oil Grade SAE:
2OW/50
Engine Oil quantity (litres):
20W/50 ENGINE OIL
Engine Oil quantity with filter (litres):
2.1 LITRE
Float Height:
26.3 + OR-1.0 MM
Fork oil grade:
50/50 mixture fork oil and 10w/30 engine oil
Front Fork Oil cc (left leg):
160cc
Front Fork Oil cc (right leg):
160cc
Idle Speed (rpm):
1100 RPM
Points Gap mm:
0.35mm (0.014inch)
Spark Plugs Gap (mm):
06-08MM
Tyre Pressure Back Bar / psi:
28 PSI
Tyre Pressure Back - Pillion Bar / psi:
32 PSI
Tyre Pressure Front Bar / psi:
25 PSI
Tyre Pressure Front - Pillion Bar / psi:
25 PSI
Valve Clearance Cold - Exhaust:
0.040 - 0.70 mm
Valve Clearance Cold - Inlet:
0.025 - 0.055 MM

Brakes

Front:
Disc
Rear:
Drum
Brake fluid:
DOT 3(US) OR SAE J1703 (UK)
Front-Pistons-per-caliper:
1

Dimensions

Dry Weight:
172 KG (379LB)
Fuel Capacity:
14 LITRES
Height:
1110MM (43.7 INCH)
Length:
2085MM (82.1 INCH)
Reserve Fuel Capacity:
1.6 LITRES
Seat Height:
30 INCH
Wheelbase:
1385MM (54.5 INCH)
Width:
835MM (32.9 INCH)

Electrics

Voltage:
12v
Battery:
YB10L-A2
Bulb-Headlight:
35/35W U.K /50/35W U.S.A
Main Fuse:
15 AMPS
Spark Plugs:
NGK B8ES OR NIPPON DENSO W24ES

Engine

Type:
Air Cooled 4 Stroke DOHC Straight Twin
Air Filtration:
OILED FOAM
Bore x Stroke:
67.0mm×60.02
Carburation:
2 X BS34SS MIKUNI
Carburation Idle Jet:
20
Carburation Main Jet:
110
Compression Ratio:
9.1 :1
Displacement:
423 CC
Fuel Minimum Octane Rating:
N/A
Lubrication System:
WET SUMP
No. of Valves:
2 PER CYLINDER
Pilot Screw Setting:
20
Starting:
ELECTRIC / KICK

Transmission

Chain Number of Links:
104
Chain type:
530
Clutch Type:
WET
Final Drive:
2.714
Gearchange Pattern:
1 N 2 3 4 5
Gear Ratio 1st:
2.461.1
Gear Ratio 2nd:
1.777.1
Gear Ratio 3rd:
1.380.1
Gear Ratio 4th:
1.125.1
Gear Ratio 5th:
0.961.1
Gear Ratio 6th:
0.851.1
Sprocket front:
14
Sprocket rear:
45
Transmission:
6 SPEED

Misc.

Colour Options:
black/red /blue
Exhaust:
2 INTO 2
Frame:
DUPLEX
Fuel Control:
4 STAR
Motorcycle Style:
SPORTS/TOURER
Place of Manufacture:
japan

Power

Fuel Consumption:
45 MILES PER GALLON
Max Power Output:
40bhp@8,500 rpm
Top Speed:
105 MPH

Suspension

Front:
HYDRAULICALLY DAMPED TELESCOPIC
Rear:
TWIN SHOCKS

Tyres

Front:
300-18 Tubed
Rear:
350-18 Tubed

Wheels

Front:
18 INCH
Rear:
18 INCH