A Brief History of the Marque
Narcis Casas and Josep M Pibernat entered the trials motorcycle business in 1974 with the equivalent of US$600. Their first motorcycles were produced in 1985 and by the year 2000 the factory was pushing some 9000 units out the door annually.
The firm was a Bultaco agent, and when Bultaco closed in 1980 they began importing SWM machines from Italy and became the Spanish distributor. SWM ceased manufacture a few years later, and a decision was made by the partners to begin their own marque under the trading name of their firm, Gas Gas, and based on the SWM.
The next model appeared in 1986, named Halley for the comet which passed by that year. This one bore little relationship to the SWM.
They acquired the Merlin marque in 1988.
By the end of the 1980s they were building, in addition to their now very successful trials machines, enduro and MX motorcycles.
In 2014 they began to experience problems, and after a merger with Ossa the company was bankrupted in 2015.
A new owner was appointed by the court, Torrot Electric. As of 2026, Gas Gas is still going strong.
Gas Gas models include:
GasGas 125 EC 1994
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 53.9 x 54.5 mm., 124.3 c.c. Power: 39 hp at 10800 rpm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi Magnum 45 mm. Front travel 285 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 88 kg (dry).
GasGas 250 EC 1995
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 66.4 x 72 mm., 249 c.c. Power: 52 hp at 8000 rpm. Carburettor: Keihin PWK 38 mm. 5-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi Magnum 45 mm. Front travel 295 mm. Rear suspension: Öhlins monoshock - travel 290 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 112 kg (dry). Fuel capacity: 8 litres.
GasGas 250 EC 1996
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 66.4 x 72 mm., 249 c.c. Power: 52 hp at 8000 rpm. Carburettor: Keihin PWK 38 mm. 5-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi Magnum 45 mm. Front travel 285 mm. Rear suspension: Öhlins monoshock - travel 315 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 99 kg (dry). Fuel capacity: 9 litres.
GasGas 250 EC 1997
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 66.4 x 72 mm., 249 c.c. Power: 52 hp at 8000 rpm. Carburettor: Keihin PWK 38 mm. 5-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi Magnum 45 mm. Front travel 285 mm. Rear suspension: Öhlins monoshock - travel 315 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 99 kg (dry). Fuel capacity: 9 litres.
GasGas 250 EC 1998
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 66.4 x 72 mm., 249 c.c. Power: 49.24 hp at 8699 rpm. Torque: 4.35 mkg at 7628 rpm. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi Magnum 45 mm. Front travel 285 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 115.5 kg (wet). Fuel capacity: 9.5 litres.
GasGas 125 EC 1998
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 54 x 54.4 mm., 124.5 c.c. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi Magnum 45 mm. Front travel 295 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 110 kg (wet). Fuel capacity: 8 litres.
GasGas 300 EC 1999
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 72 x 72 mm., 293.1 c.c. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi Magnum 45 mm. Front travel 285 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Fuel capacity: 9.5 litres.
GasGas 250 EC 1999
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 66.4 x 72 mm., 249 c.c. Power: 49.24 hp at 8699 rpm. Torque: 4.35 mkg at 7628 rpm. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi Magnum 45 mm. Front travel 285 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 111 kg (dry). Fuel capacity: 9.5 litres.
GasGas 200 EC 1999
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 62.5 x 65 mm., 199.4 c.c. Power: 37 hp at 9000 rpm. Torque: 3.3 mkg at 7850 rpm. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi Magnum 45 mm. Front travel 285 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 107 kg (dry). Fuel capacity: 9.5 litres.
GasGas 300 EC 2002
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 72 x 72 mm., 293.1 c.c. Power: 50.6 hp at 7340 rpm. Torque: 5.02 mkg at 6890 rpm. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: White Power USD 43 mm. Front travel 295 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Fuel capacity: 9.5 litres.
GasGas 250 EC 2003
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 66.4 x 72 mm., 249 c.c. Power: 49.84 hp at 8699 rpm. Torque: 4.65 mkg at 7628 rpm. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi USD 45 mm. Front travel 295 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 115 kg (wet). Fuel capacity: 9.5 litres.
GasGas 125 EC 2004
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 54 x 54.5 mm., 124.8 c.c. Power: 36.8 hp at 10500 rpm. Torque: 2.57 mkg at 10000 rpm. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi USD 45 mm. Front travel 295 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Saddle height 940 mm. Weight: 107.6 kg (wet). Fuel capacity: 9.5 litres.
GasGas 300 EC 2006
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 72 x 72 mm., 293.1 c.c. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi USD 45 mm. Front travel 295 mm. Rear suspension: Öhlins monoshock - travel 310 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 115 kg (wet). Fuel capacity: 9.5 litres.
GasGas 250 EC 2013
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 66.4 x 72 mm., 249 c.c. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi USD 45 mm. Front travel 295 mm. Rear suspension: Sachs monoshock - travel 310 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Saddle height 940 mm. Weight: 101 kg (dry). Fuel capacity: 10.5 litres.
GasGas 450 FSE 2003
Engine
Liquid-cooled, 4-stroke, single-cylinder. , DOHC, 4 valve head. Bore x Stroke: 95 x 62.6 mm., 443.66 c.c. Induction: Magneti-Marelli fuel injection 6-speed gearbox. Hydraulic clutch actuation. Electric start.
Chassis
Frame: steel. Fork: White Power USD 43 mm. Front travel 295 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Weight: 127.5 kg (wet). Fuel capacity: 9.5 litres.
GasGas 125 GT12 1993 Trials
Engine
Liquid-cooled 2-stroke single-cylinder. Bore x Stroke: 56 x 50.6 mm., 124.6 c.c. Carburettor: Dellorto 26 mm. 6-speed gearbox. Cable-actuated clutch. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi USD 35 mm. Front travel 175 mm. Rear suspension: Boge monoshock. - travel 180 mm. Brakes: Front 185 mm disc. Rear 160 mm disc. Weight: 77 kg (dry). Fuel capacity: 4.5 litres.
GasGas 320 GT32 1991 Trials
Engine
Liquid-cooled 2-stroke single-cylinder. Carburettor: Dellorto 25 mm. 6-speed gearbox. Cable-actuated clutch. Kickstarter.
Chassis
Frame: steel deltabox Fork: Marzocchi USD Front travel 185 mm. Rear suspension: Corte-Cosso monoshock - travel 180 mm. Brakes: Front 180 mm disc. Rear 170 mm disc. Weight: 85 kg (dry). Fuel capacity: 4 litres.
GasGas 325 Halley 1986 Trials
Engine
Air-cooled 2-stroke single-cylinder. Cable-actuated clutch. Kickstarter.
Chassis
Frame: steel cradle Rear suspension: monoshock. Brakes: Front disc, rear drum.
GasGas 327 Halley 1990
Engine
Air-cooled 2-stroke single-cylinder. Carburettor: Dellorto 28 mm. 6-speed gearbox. Cable-actuated clutch. Kickstarter.
Chassis
Frame: steel cradle Fork: Marzocchi. Front travel 160 mm. Rear suspension: Corte-Cosso monoshock Brakes: Front 180 mm disc. Rear 160 mm disc. Weight: 85.5 (wet). Fuel capacity: 4.2 litres.
GasGas 125 JTR 1996 Trials
Engine
Liquid-cooled 2-stroke single-cylinder. Bore x Stroke: 56 x 50.6 mm., 124.6 c.c. Carburettor: Dellorto 26 mm. 6-speed gearbox. Cable-actuated clutch. Kickstarter.
Chassis
Frame: steel. Fork: Gasgas. Rear suspension: monoshock. Brakes: Front 185 mm disc. Rear disc.
GasGas 125 MC 2004 Motocross
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 54 x 54.5 mm., 124.8 c.c. Power: 36.8 hp at 10500 rpm. Torque: 2.57 mkg at 10000 rpm. Carburettor: Keihin PWK 38 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: steel. Fork: Marzocchi USD 45 mm. Front travel 300 mm. Rear suspension: Öhlins monoshock - travel 320 mm. Brakes: Front 260 mm disc. Rear 220 mm disc. Saddle height 952 mm. Weight: 104.5 kg (wet). Fuel capacity: 9 litres.
GasGas 50 TXT BOY 2009 Trials
Engine
Liquid-cooled, 2-stroke single-cylinder. Bore x Stroke: 40 x 39.3 mm., 49.38 c.c. Carburettor: Dellorto 14 mm. 6-speed gearbox. Hydraulic clutch actuation. Kickstarter.
Chassis
Frame: CR-MO steel. Fork: 32 mm. Rear suspension: monoshock. Brakes: Front 160 mm disc. Rear 150 mm disc. Saddle height 600 mm. Weight: 42 kg (dry). Fuel capacity: 3 litres.
More GasGas models:
125 SM 2001-08
Type: Motard, capacity: 125cc single
EC 125 2003-08
Type: Enduro, capacity: 125cc single
EC 125 Dep. 2003-08
Type: Enduro, capacity: 125cc single
EC 125 Depo 2008-11
Type: Enduro, capacity: 125cc single
EC 125 H 2008-
Type: Enduro, capacity: 124cc single
EC 250 2008-09
Type: Enduro, capacity: 250cc single
EC 350 F 2026
DOHC 6-speed liquid-cooled single
EC 500 F 2026
SOHC 6-speed liquid-cooled single
Sources: wikipedia.es, gasgas.com, Le Guide Vert, et al.
Wed Oct 28 2009
rasampson at btinternetdot com
workshop manual
gas gas jtr 270
I need to get hold of a manual for my 1996 gas gas jtr 270 any ideas welcome
loughborough uk
Tue Sep 04 2007
phil.jackson5 at baesystemsdot com
vehicle year ident
gas gas tx 250 98 model
hi, how can i prove year of bike for registration purposes
lake district
Wed Dec 06 2006
leightonrogers at hotmaildot com
gas gas trials bike year determination
gas gas tx250
Hello,
I was wondering how I can determine the year of manufacture from the frame number ?
Many thanks,
Leighton Rogers
Cardiff UK
Mon Nov 13 2006
ianphillipselec at aoldot com
youth mx
gasgas 65
at 2005 dirtbike show (stoneleigh) we saw a 65cc gasgas motocross bike and was impressed with it. Since then we have heard no news of release.Please advise of availability and also availability of spares.We will be at the show on Nov 16th
2006 and would appreciate some guidance as we run a competetive motocross team.Regards Ian Phillips
Director of I.C.PHILLIPS (uk) Ltd
Wed Sep 13 2006
kathy at tomsupholstery.ca
service manual
1995 gasgas 250 trials bike
I am looking for a service/owners manual for a 1995 gasgas 250 trials bike.
Ontario, Canada
Thu May 18 2006
tonybdb at bigpond.net.au
head tension settings
fse 450 03
could you please tell me the head tension settings
australia
The Spanish GAS-GAS site has downloadable manuals for the FSE450. Ed.
