The Suzuki RG 400 Gamma motorcycle specifications include a 397.4 cc (24.25 cu in) engine, a 6-speed gearbox, and a listed weight of 181 kg (399 lb).
Key specifications
The 1985 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
How the Suzuki RG 400 Gamma compares
This compares the motorcycle with all Suzuki models in this specifications database. The blue marker is this model and the grey line is the Suzuki database average.
About 35% lower than the Suzuki database average. Around the 34th percentile across Suzuki models.
About 10% lighter than the Suzuki database average. Around the 36th percentile across Suzuki models.
Very close to the Suzuki database average. Around the 37th percentile across Suzuki models.
About 55% larger than the Suzuki database average. Around the 99th percentile across Suzuki models.
Dimensions compared with Suzuki average
Each measurement is compared with the average value across Suzuki models where that dimension is available.
2,100
2,137
Close to average.
695
823
16% below average.
1,185
1,158
Close to average.
1,425
1,444
Close to average.
770
786
Close to average.
120
176
32% below average.
Mechanical overview
Additional useful specifications
| Front tire size | 2.50-16 |
|---|---|
| Rear tire size | 2.75-17 |
| Estimated theoretical fuel range | 244 km |
| Bore/stroke ratio | 0.99:1 (Square) |
Engine specifications
| Engine type | V4, two-stroke |
|---|---|
| Displacement | 397.4 cc (24.25 cu in) |
| Bore × stroke | 50.0 x 50.6 mm (2.0 x 2.0 inches) |
| Compression ratio | 7.0:1 |
| Valves per cylinder | 1 |
| Cooling system | Liquid |
| Fuel system | Carburettor. Mikuni VM28SH (VM28SS), four (Flat Slide) |
| Fuel control | Rotary valves |
| Ignition | electronic SUZUKI ´PEI´ 14deg B.T.D.C.below1700rpm 26deg B.T.D.C. (2700 – 6,000rpm) 11deg B.T.D.C.above9500rpm; NGK : BR9ES; 12V 14.4KC (4Ah)/10HR; Three-phase AC.; 20A |
| Starter | Kick |
| Lubrication | Suzuki ´CCI´ Oil pump injection (carbs) + Wet sump (transmission/clutch) |
Transmission and drivetrain
| Gearbox | 6-speed |
|---|---|
| Final drive | Chain (final drive) |
| Clutch | Wet 8-plate type |
Chassis and 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 (5.1 inches) |
| Rear wheel travel | 127 mm (5.0 inches) |
| Rake | 25.5° |
| Trail | 110 mm (4.3 inches) |
Brakes, wheels and tires
| Front brakes | Double disc. 4-piston calipers |
|---|---|
| Rear brakes | Single disc. 2-piston caliper |
| Front tire | 2.50-16 |
| Rear tire | 2.75-17 |
Dimensions and weight
| Wet weight | 181 kg (399 lb) |
|---|---|
| Dry weight | 154 kg (339.5 lb) |
| Seat height | 770 mm (30.3 inches) |
| Overall length | 2,100 mm (82.7 inches) |
| Overall width | 695 mm (27.4 inches) |
| Overall height | 1,185 mm (46.7 inches) |
| Wheelbase | 1,425 mm (56.1 inches) |
| Ground clearance | 120 mm (4.7 inches) |
Fuel and emissions
| Fuel capacity | 22.00 L (5.81 US gal) |
|---|---|
| Reserve fuel capacity | 5.00 L (1.32 US gal) |
| Fuel consumption | 9.00 L/100 km (11.1 km/l or 26.14 mpg) |
| Greenhouse gases | 208.8 CO 2 g/km. (CO2 – Carbon dioxide emission) |
Performance
| Top speed | 205.0 km/h (127.4 mph) |
|---|---|
| 0–100 km/h | 4.90 seconds |
| 1/4 mile | 11.80 seconds |
| Power/weight ratio | 0.3831 hp/kg |
Other specifications
| Color options | Blue/white, Black/white, Black/red |
|---|---|
| Exhaust system | 4 into 4 steel pipes with expansion chambers |
| Comments | Differences 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 pipes have thinner stingers and only there, the lower silencers themselves; 400+500 exhaust pipes are interchangeable; final ratio 15/41 instead of 16/40 (500); 525 chain instead of 530 (500); decals, but only on the side panels next to the front seat; 400 has the fuel integrated gauges; tank with fuel gauge output adaption; electrical harness has only a few wires more for fuel gauge; front break rotors are ´no´ floating type. |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Suzuki models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Suzuki information before relying on them. Visit the official Suzuki website.