Yamaha YZF R 125cc
Overview
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| The R-series start here
With its R-series styling, sporty performance and handling, the YZF-R125 is the perfect introduction to supersport riding. Its liquid-cooled, 4-stroke, 4-valve, single cylinder, SOHC engine is tuned to deliver free-revving performance. Like all R-series bikes, it features a lightweight Deltabox frame; linked to a cast aluminium swinging-arm it gives the R125 class-leading handling. Lightweight 5-spoke wheels help to minimise unsprung weight to give impressive roadholding, while effective stopping power comes from a large diameter 292mm front disc and 230mm diameter rear disc.
Details
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Features
Yamaha 125cc: The all-round experience.
At Yamaha we believe you get out what you put in, and with over half a century of innovation in motorcycle manufacture that means some pretty special machines. The 125cc range embodies the values of freedom, fun and fulfilment, each one built with the same passion that comes from decades of competing and winning at the highest level.
Forging new technology and bringing it to the road is what Yamaha is all about. Our 125s do more than just look the business, they do the business - day in, day out. Covering every need from simple economy to custom luxury, they'll take you places other 125s wouldn't dare.
Liquid-cooled 4-stroke single-cylinder 125cc engine
The YZF-R125's advanced engine combines a 4-valve cylinder head and fuel-injection for the best possible performance. The short stroke layout gives the engine a free-revving character, which when driven by the 6-speed gearbox, delivers lively acceleration.
R-series style bodywork
With R-series style front cowling and twin fox-eye headlights, the YZF-R125 has the same aggressive supersport styling as the R1 and R6. Unlike many 125cc bikes, the R125 is built on a full-sized chassis providing a more comfortable riding position - especially for taller riders.
Large diameter disc brakes
Yamaha is committed to using high-specification components - like the large diameter 292mm front disc brake units on the YZF-R125. The compact twin-pot caliper design on the front-brake combined with the 230mm rear disc ensures smooth, controlled braking at a range of speeds and assured stopping power when you need it.
Sporty mid-ship muffler
The mid-ship exhaust muffler contributes to centralise the bike's mass for balanced handling, and houses dual catalysers for cleaner emissions. In addition, an Air Induction System introduces air into the exhaust for more complete combustion of exhaust gases, lowering emissions even further.
Instrument panel
The combined digital and analogue panel speedometer provides a clear view of all the bike's vital functions at a glance.
Aluminium swinging arm
The R125 features a lightweight Deltabox frame which delivers an optimum balance of strength and rigidity for class-leading handling performance. Complementing the frame is a lightweight cast aluminium swinging arm that allows the link-type rear suspension system to operate more efficiently and deliver more responsive handling qualities.
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Specifications |
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| Engine |
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Engine type |
liquid-cooled, Single cylinder, 4-stroke, 4-valves, SOHC |
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Displacement |
124.66cc |
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Bore x stroke |
52.0 mm x 58.6 mm |
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Compression ratio |
11.2 : 1 |
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Maximum Power |
11.0 kW (15PS) @ 9,000 rpm |
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Maximum Torque |
12.24 Nm (1.25 kg-m) @ 8,000 rpm |
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Lubrication system |
Wet sump |
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Carburettor |
Fuel Injection |
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Ignition system |
TCI |
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Starter system |
Electric |
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Transmission system |
Constant Mesh, 6-speed |
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Final transmission |
Chain |
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| Chassis |
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Frame |
Steel Deltabox |
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Front suspension system |
Telescopic forks |
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Front Travel |
130 mm |
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Caster Angle |
24.2º |
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Trail |
86.1 mm |
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Rear suspension system |
(monocross), Swingarm |
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Rear Travel |
125 mm |
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Front brake |
Single Disc, Ø 292 mm |
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Rear brake |
Single Disc, Ø 230 mm |
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Front tyre |
100/80-17 M/C |
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Rear tyre |
130/70-17 M/C |
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| Dimensions |
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Overall length |
2,015 mm |
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Overall width |
660 mm |
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Overall height |
970 mm |
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Seat height |
818 mm |
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Wheel base |
1,355 mm |
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Minimum ground clearance |
155 mm |
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Wet weight (including full oil and fuel tank) |
138 kg |
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Fuel tank capacity |
13.8 litres |
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Oil tank capacity |
1.15 litres |


