Sportbikes
1985Suzuki RG 400 Gamma
44 fields on record
The 1985 Suzuki RG 400 Gamma is a lightweight sport bike that appeals to riders seeking affordable, nimble performance. Its 397cc V4 engine delivers 59 horsepower at 10,000 rpm, providing spirited acceleration and excellent handling characteristics typical of mid-1980s Japanese sportbikes. Best known for its compact four-cylinder engineering and race-inspired design, it remains a cult favorite among enthusiasts valuing vintage lightweight sport machines.
- Capacity
- 397.4 ccm
- Engine
- V four
- Gearbox
- 6-speed
- Dry weight
- 154.0 kg
- Seat height
- 770 mm
- Power
- 59.0 HP (43.4 kW) @ 9000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built as a lightweight, high-revving sport bike for spirited backroad riding and track-day thrills rather than practical transportation.
- Built for
- A raw, buzzy, and thrilling two-stroke that rewards riders who love revving it out near 10,000rpm and carving corners on its light aluminium chassis.
- Not ideal for
- This is not the bike for riders wanting comfort, passenger space, long-distance touring capability, or a forgiving, low-maintenance ride.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 397.4 ccm
- Power
- 59.0 HP (43.4 kW) @ 9000 RPM
- Engine type
- V four
- Power/weight ratio
- 0.3831 HP/kg
- Bore x stroke
- 50.0 x 50.6 mm
- Compression
- 7.0:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- electronic SUZUKI ´PEI´ 14deg B.T.D.C.below1700rpm 26deg B.T.D.C. (2700 - 6000rpm) 11deg B.T.D.C.above9500rpm; NGK : BR9ES; 12V 14.4KC (4Ah)/10HR; Three-phase AC.; 20A
- Valves per cylinder
- 1
- Lubrication system
- Suzuki ´CCI´ Oil pump injection (carbs) + Wet sump (transmission/clutch)
- Torque
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- wet 8-plate type
Performance
- Top speed
- 205.0 km/h (127.4 mph)
Dimensions & weight
- Wheelbase
- 1425 mm
- Overall length
- 2100 mm
- Overall width
- 695 mm
- Overall height
- 1185 mm
- Seat height
- 770 mm
- Dry weight
- 154.0 kg
- Wet weight
- 181.0 kg
- Fuel capacity
- 22.00 litres
- Ground clearance
- 120 mm
- Reserve fuel capacity
- 5.00 litres
- Front percentage of weight
- 49
Chassis & suspension
- Frame
- double downtube, full cradle, box section aluminium perimetre frame
- Front suspension
- 38mm Telescopic pneumatic/coil spring oil damped with posi-damp unit, adjustable anti dive valving. Spring pre-load fully adjustable
- Rear suspension
- Full-floating suspension sytem, gas/oil damped, spring pre-load fully adjustable
- Front wheel travel
- 130 mm
- Rear wheel travel
- 127 mm
- Rake (fork angle)
- 25.5°
- Trail
- 110 mm
Brakes & wheels
- Front brakes
- Double disc. 4-piston calipers
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc. 2-piston caliper
- Rear brakes diameter
- 210 mm
- Front tyre
- 2.50-16
- Rear tyre
- 2.75-17
Other
- Color options
- 85_Champion_Blue-Super_white (RG500Gamma same = 7GF), 85_Black-Super_white (RG500Gamma same = 7TV) 85_black-red-WW Walter Wolf
- Modifications compared to previous model
- differnces to the 500 model: cylinders; gaskets; cylinder heads; upper engine case is different, would be needed to drill out for a 500 barrel fittment; big end crankshaft needle bearing has one less pin than the 500; 2 different RVs and both different to the 500, different inner-outer covers and rotary valves themselves, only in the center match, same durations; shorter clutch basket; shorter clutch hub; 8 instead of 9 clutch plates; shape of the carb needle, #135 main jet instead of #120 (500); exhaust p
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 1985 | 1986 | 1987 |
|---|---|---|---|
| Capacity | 397.40 ccm (24.25 cubic inches) | 397.40 ccm (24.25 cubic inches) | 400.00 ccm (24.41 cubic inches) |
| Dry weight | 154.0 kg (339.5 pounds) | 154.0 kg (339.5 pounds) | — |
| Seat height | 770 mm (30.3 inches) | 770 mm (30.3 inches) | — |
| Fuel capacity | 22.00 litres (5.81 gallons) | 22.00 litres (5.81 gallons) | 22.00 litres (5.81 gallons) |
| Color options | 85_Champion_Blue-Super_white (RG500Gamma same = 7GF), 85_Black-Super_white (RG500Gamma same = 7TV) 85_black-red-WW Walter Wolf | 85_Champion_Blue-Super_white (RG500Gamma same = 7GF), 85_Black-Super_white (RG500Gamma same = 7TV) 85_black-red-WW Walter Wolf | red/gray or blue/white |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Suzuki RG 400 Gamma?
The 1985 Suzuki RG 400 Gamma has a Capacity of 397.4 ccm (24.25 cubic inches).
What engine power does the Suzuki RG 400 Gamma have?
The 1985 Suzuki RG 400 Gamma has a Power of 59.0 HP (43.4 kW) @ 9000 RPM.
How many gears does the Suzuki RG 400 Gamma have?
The 1985 Suzuki RG 400 Gamma has a Gearbox of 6-speed.
How much does the Suzuki RG 400 Gamma weigh?
The 1985 Suzuki RG 400 Gamma has a Dry weight of 154.0 kg (339.5 pounds).
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