43,669 bikes · 493 makes Add a bikeLog inRegister
Motocross Bikes

2021GAS GAS MC 125

Rate this bike
Click to vote

34 fields on record

The 2021 GAS GAS MC 125 is a competitive motocross bike engineered for intermediate to advanced riders seeking aggressive performance. Its lightweight 124.8cc two-stroke engine delivers 40 horsepower with sharp throttle response, while advanced WP suspension and Brembo braking systems provide precise handling and control on demanding tracks.

Capacity
124.8 ccm
Engine
Single, two-stroke
Gearbox
6-speed
Dry weight
87.5 kg
Seat height
950 mm
Power
40.0 HP (29.2 kW)
⇄ Compare with another bike + Add to garage All model years

What’s new for the 2021 GAS GAS MC 125

vs the 2020
Spec20202021
Power — 40.0 HP (29.2 kW)
Front suspension 45 mm upside-down Marzocchi or Ohlins, 295 mm travel WP XACT-USD, Ø 48 mm
Rear suspension One-piece aluminium swing arm, progressives system with Ohlins, shock absorber, 320 mm travel WP XACT Monoshock with linkage
Front brakes Single disc. with 1-piston calipers Single disc. 1-piston calipers
Rear brakes Single disc. with 1-piston calipers Single disc. 1-piston calipers
Other years 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027

How it rides

Editorial estimate from the spec sheet - not lab tested
Speed 57Agility 93Comfort 30Off-road 98Touring 10Road manners 15
Off-road & trail98%
Cornering85%
City riding5%
Daily riding5%
Touring8%
Two-up0%
Track90%
Best for
Built purely for closed-course motocross racing and serious off-road competition, not for general transportation.
Built for
A raw, lightweight, high-revving two-stroke racer that rewards aggressive riding with sharp agility and explosive acceleration on the track.
Not ideal for
This is not the right bike for commuting, touring, carrying a passenger, or riders seeking comfort and ease of use.

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 us
At 950mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2021 GAS GAS MC 125, with a cramped knee angle of around 85 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

Find bikes that fit your height →

Full specifications

Engine
Capacity
124.8 ccm
Power
40.0 HP (29.2 kW)
Engine type
Single, two-stroke
Power/weight ratio
0.4571 HP/kg (dry)
Bore x stroke
54.0 x 54.5 mm
Cooling system
Liquid
Fuel system
Carburettor
Starting
Kick
Ignition
Kokusan EMS
Lubrication system
2% mixture
Transmission
Gearbox
6-speed
Transmission type
Manual
Final drive
Chain
Clutch
Wet multi-disc DS clutch, Brembo hydraulics
Dimensions & weight
Wheelbase
1475 mm
Seat height
950 mm
Dry weight
87.5 kg
Fuel capacity
7.00 litres
Ground clearance
375 mm
Chassis & suspension
Frame
Central double-cradle-type 25CrMo4 steel
Front suspension
WP XACT-USD, Ø 48 mm
Rear suspension
WP XACT Monoshock with linkage
Front wheel travel
310 mm
Rear wheel travel
300 mm
Rake (fork angle)
26.1°
Brakes & wheels
Front brakes
Single disc. 1-piston calipers
Front brakes diameter
260 mm
Rear brakes
Single disc. 1-piston calipers
Rear brakes diameter
220 mm
Front tyre
90/90-21
Rear tyre
120/90-18
Other
Color options
Red/white
Comments
Spanish brand.

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 20042010201620212027
Capacity 124 cc 124 cc 125 cc 125 cc 125 cc
Dry weight 92 kg 92 kg 92 kg 88 kg 93 kg
Seat height 940 mm 940 mm 940 mm 950 mm 956 mm
Fuel capacity 9.5 L 9.5 L 9.5 L 7 L 7.9 L

Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.

Rider Reviews

—
☆☆☆☆☆
Be the first to rate
MotorcycleDB

The 2021 GAS GAS MC 125 is a strong contender in the world of motocross bikes. With its powerful 125cc engine and agile handling, this motorcycle is perfect for riders of all skill levels. The lightweight design and responsive suspension make for an exhilarating riding experience, whether on the track or out on the trails. The stylish and modern aesthetics of the MC 125 make it a standout choice for riders looking for both performance and style in a motocross bike.

When it comes to performance and reliability, the 2021 GAS GAS MC 125 delivers on all fronts. The bike's sturdy construction and top-notch components ensure that it can handle the rigors of off-road riding with ease. With a comfortable seating position and intuitive controls, the MC 125 offers a smooth and enjoyable ride every time. Overall, the 2021 GAS GAS MC 125 is a top-notch motocross bike that combines power, agility, and style in a way that is sure to impress any rider.

Own one? Add it to My Garage and write an owner review with an Owner badge.

Common questions

What is the engine size of the GAS GAS MC 125?

The 2021 GAS GAS MC 125 has a Capacity of 124.8 ccm (7.62 cubic inches).

What engine power does the GAS GAS MC 125 have?

The 2021 GAS GAS MC 125 has a Power of 40.0 HP (29.2 kW).

How many gears does the GAS GAS MC 125 have?

The 2021 GAS GAS MC 125 has a Gearbox of 6-speed.

How much does the GAS GAS MC 125 weigh?

The 2021 GAS GAS MC 125 has a Dry weight of 87.5 kg (192.9 pounds).

Shop this bike

Affiliate links

We may earn a commission from qualifying eBay or Amazon purchases made through these links. As an Amazon Associate I earn from qualifying purchases.

Similar bikes

Same category, weighted similarity

More GAS GAS Motorcycles