Suzuki RG 125 Gamma




Make Model.

Suzuki RG 125 Gamma




Two stroke, single cylinder, crankcase reed valve


124 cc / 7.6 cu-in
Bore x Stroke 54 x 54 mm
Compression Ratio 7.4:1
Cooling System Liquid cooled
Lubrication Suzuki CCI


28mm Mikuni carburetor



Max Power

18.4 kW / 25 hp @ 9.500 rpm

Max Torque

19.1 Nm / 1,95 kg-m / 14.1 lb-ft @ 8500 rpm.
Clutch Wet multi-plate type


6 Speed 
Final Drive Chain

Front Suspension

30 mm Telescopic forks

Rear Suspension

Single shock linkage

Front Brakes

Single 230 mm disc

Rear Brakes

130 mm Drum

Front Tyre

80/100 S16

Rear Tyre

90/90 S18


Length 2 030 mm / 79.9 in

Width   660 mm / 26.0 in

Height 1155 mm / 45.5 in

Wheelbase 1310 mm / 51.6 in
Seat Height 730 mm / 28.7 in

Dry Weight

96 kg / 209 lbs

Fuel Capacity 

12 Litres / 3.2 US gal / 2.6 Imp gal

Standing ¼ Mile  

20.3 sec

Top Speed

111 km/h / 69 mph

The little and spicy member of the Gamma-family
In March 1983 Suzuki presented the RG250 Gamma to show who's the king of the road track and a couple of years later the RG125 Gamma was introduced to give a match to the Italian 125cc racers.

RG125 Gamma was introduced in Europe at IFMA '84, the International Bike Show in Cologne, West-Germany, in late 1984. The bike at the show had only a 80cc engine and the 125cc version was to be introduced later. There's nearly no market at all for 125cc motorcycles in West-Germany but the 80cc bikes sold very well.

The RG125 Gamma borrowed a lot from its bigger brothers, RG250 and RG500 Gamma but the single cylinder RG125 was very narrow, making it almost impossible for the sides of the motorcycle to touch the tarmac when leaning the bike in corners. The maximum leaning angle is whole 55 degrees! The first model had only 105 kg (231 lbs) dry mass. Its steel frame was almost fragile but it worked well. The brakes were good at the time and had a great feeling.

Riding a RG125 Gamma is quite unpleasant experience for the taller riders. The small dimensions of the bike gives a great racing feeling but it certainly isn't a bike for touring.

The water-cooled two-stroke engine vibrates a lot and the rear mirrors are blurry at all speeds. It delivers a lot of power, though (25 hp, 19 Nm). For more powerful mid-range the engine has a system called AEC, that opens an extra exhaust chamber.

Only cosmetic changes were made to the RG125 Gamma between 1985 and 1991. The 1992 year's RG125 Gamma was totally redigned. The frame, the suspension and everything of the bike were better. The engine was upgraded to deliver 33 hp at 11.250 rpm. The new RG125 Gamma borrowed a lot from the RGV250. The engine can be described a s a RGV250 engine with a single cylinder instead of two. Even the 125cc engine got an electric starter and balance axel to reduce vibrations.

A naked version called RG125U Wolf was also introduced in 1992.