Spec Sheet
The information below is specific to the Suzuki - GS 425 EN 78, showing anything for service information to the amount of fork oil or even the tyre pressures. If you would like to contribute any missing information, please use the edit link below.
Back.Suzuki - GS 425 EN 78
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.
Chassis info:
GS425 100001-399999 500001-599999
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:
19 INCH
Rear:
18 INCH
Add information to the model
All information presented on the website is given to the best of our knowledge at the given time. All information is intended to only as a guide. A major Japanese manufacturer's quote:
We reserve the right to vary our specification with or without notice, and as such time and in such manner as we think fit.