Key performance

10 ch
Power
🔧
124 cc
Displacement
⚖️
112 kg
Weight
🏎️
90 km/h
Top speed
10.3 L
Fuel capacity
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Technical specifications

Changements 2020 2022

No spec differences between these two model years.

Engine

Displacement
124 cc
Power
10.1 ch @ 8500 tr/min (7.3 kW)
Torque
8.9 Nm @ 7500 tr/min
Engine type
Single cylinder, four-stroke

Brakes

Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)
Front tyre
2.75-18
Rear tyre
3-18

Dimensions

Wheelbase
1232.00 mm
Ground clearance
120.00 mm
Length
1940.00 mm
Width
760.00 mm
Height
1050.00 mm
Fuel capacity
10.30 L
Weight
112.00 kg
Dry weight
102.00 kg

Overview

In 2022, unveiling a 124 cc sportbike with drum brakes on both wheels is an act of faith. The Fosti F21 does not concern itself with European market expectations; it caters to a world where mechanical simplicity and acquisition cost still dictate the law. Its four-stroke single-cylinder engine breathes calmly, delivering 10.1 horsepower at 8500 rpm and 8.9 Nm of torque. These figures will not shake the Yamaha YZF-R125 or the KTM RC 125, but they sketch the profile of an initiation machine or radical urban mobility.

Fosti F21

With 112 kg with a full tank and a 10.3-liter tank, the F21 promises a theoretical range exceeding 450 kilometers, a frugality that becomes its main argument against a scooter. Its announced top speed of 90 km/h limits it to the suburbs and national roads, but its featherweight and wheelbase of 1232 mm should confer agility for its size in tight spaces. A ground clearance of 120 mm suggests measured roll angles, consistent with 2.75 and 3-18 tires.

The lack of detailed specifications on the fork, the shock absorber, or the type of frame speaks for itself. Here, everything is subordinate to robustness and ease of maintenance. Drum brakes, now anachronistic on a sportbike in Europe, guarantee progressive deceleration and certain longevity in dusty environments. This Fosti F21 fully assumes its role as a tool bike, a no-frills motorcycle object.

Who is its rider? The novice motorcyclist in regions where a graduated license does not exist, the delivery person looking for an economical and maneuverable two-wheeler, or the pure urban dweller who never needs to exceed 70 km/h. It is not intended to scrape knees on the track or shine in rallies. Its mission is elementary: to transport its user from A to B with the minimum of complications and the maximum of kilometers per liter. In this very specific niche, its lightness and consumption of 2.1 L/100 km are massive assets. A machine that resets the clock on the essentials.

Indicators & positioning

Weight-to-power ratio
0.09 ch/kg
🔄
Torque / weight
0.08 Nm/kg
🔧
Volumetric power
81.5 ch/L
In category Sport · 62-248cc displacement (1696 motorcycles compared)
Power 10 ch Top 72%
7 ch median 13 ch 27 ch
Weight 112 kg Lighter than 85%
104 kg median 134 kg 169 kg
P/W ratio 0.09 ch/kg Top 66%
0.07 median 0.10 0.20 ch/kg

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