Scooters
2018AJS Firefox 50
32 fields on record
The 2018 AJS Firefox 50 is a moped-class scooter sold in the UK by AJS. Its air-cooled 49cc four-stroke single makes 3.1 hp at 8,000 rpm through an automatic belt drive and is limited to 50 km/h. An 825 mm seat and 6.3-litre tank suit short trips.
- Capacity
- 49.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- Not on record
Know it? Add it → - Dry weight
- 85.0 kg
- Seat height
- 825 mm
- Power
- 3.1 HP (2.3 kW) @ 8000 RPM
What’s new for the 2018 AJS Firefox 50
vs the 2017| Spec | 2017 | 2018 |
|---|---|---|
| Power | 3.0 HP (2.2 kW) @ 8000 RPM | 3.1 HP (2.3 kW) @ 8000 RPM |
| Seat height | 735 mm (28.9 inches) | 825 mm (32.5 inches) |
| Fuel capacity | 4.70 litres (1.24 US gallons) | 6.30 litres (1.66 US gallons) |
| Wheelbase | 1320 mm (52.0 inches) | 1285 mm (50.6 inches) |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It serves as a low-powered runabout for very short local trips such as commuting a few streets or running quick errands.
- Built for
- It suits a cautious, practical rider who values simplicity, low running costs, and easy legal access over performance or excitement.
- Not ideal for
- It is not suitable for anyone wanting real speed, highway travel, passenger carrying, or any kind of off-road capability.
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
- 49.0 ccm
- Power
- 3.1 HP (2.3 kW) @ 8000 RPM
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.0365 HP/kg (dry)
- Bore x stroke
- 39.0 x 41.5 mm
- Cooling system
- Air
- Fuel system
- Carburettor
- Starting
- Electric & kick
- Ignition
- CDI
Transmission
- Transmission type
- Automatic
- Final drive
- Belt
Performance
- Top speed
- 49.9 km/h (31.0 mph)
Dimensions & weight
- Wheelbase
- 1285 mm
- Overall length
- 1850 mm
- Overall width
- 640 mm
- Overall height
- 1160 mm
- Seat height
- 825 mm
- Dry weight
- 85.0 kg
- Wet weight
- 91.0 kg
- Fuel capacity
- 6.30 litres
- Carrying capacity
- Lockable storage space under the seat.. Rear rack. Optional top box.
Chassis & suspension
- Frame
- Steel
- Front suspension
- Telescopic fork
- Rear suspension
- Single shock
Brakes & wheels
- Front brakes
- Single disc
- Rear brakes
- Expanding brake (drum brake)
- Front tyre
- 3.50-12
- Rear tyre
- 3.50-12
Other
- Color options
- White, blue
- Warranty
- 12
- Comments
- Sold in the UK.
Specs last verified against published sources: .
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 | 2012 | 2014 | 2016 | 2018 | 2020 |
|---|---|---|---|---|---|
| Capacity | 49 cc | 49 cc | 49 cc | 49 cc | 49 cc |
| Dry weight | 85 kg | 85 kg | 85 kg | 85 kg | 85 kg |
| Seat height | 825 mm | 825 mm | 735 mm | 825 mm | 825 mm |
| Fuel capacity | 4.7 L | 4.7 L | 4.7 L | 6.3 L | 6.3 L |
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 AJS Firefox 50?
The 2018 AJS Firefox 50 has a Capacity of 49.0 ccm (2.99 cubic inches).
What engine power does the AJS Firefox 50 have?
The 2018 AJS Firefox 50 has a Power of 3.1 HP (2.3 kW) @ 8000 RPM.
How much does the AJS Firefox 50 weigh?
The 2018 AJS Firefox 50 has a Dry weight of 85.0 kg (187.4 pounds).
Shop this bike
Affiliate linksWe may earn a commission from qualifying eBay or Amazon purchases made through these links. As an Amazon Associate I earn from qualifying purchases.
Please log in or register if you'd like to leave a comment.
Own one? Add it to My Garage and write an owner review with an Owner badge.