| MODEL | YAMAHA TT-R125 2002 - 2025 |
| Year | 2002 - 2025 |
| Engine Type | Single cylinder, four-stroke, SOHC, 2 valves |
| Displacement / Capacity | 124 cc / 7.57 cu in |
| Bore X Stroke | 54.0 x 54.0 mm / 2.1 x 2.1 in |
| Compression Ratio | 10.0:1 |
| Cooling System | Air |
| Max Power | — |
| Max Torque | — |
| Ignition | CDI |
| Induction | Carburettor, Mikuni VM20 |
| Start System | Electric (LE versions) |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5-speed |
| Clutch | Multiplate wet clutch |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel, diamond type; aluminium box-section swingarm |
| Front Suspension | 31 mm telescopic fork, adjustable preload, 180 mm / 7.1 in travel |
| Rear Suspension | Single shock, adjustable compression and rebound, 168 mm / 6.6 in travel |
| Front Brakes | Single 220 mm hydraulic disc |
| Rear Brakes | 110 mm drum (expanding brake) |
| DIMENSION SPECS | |
| Overall Length | 1885 mm / 74.2 in |
| Overall Width | 795 mm / 31.3 in |
| Overall Height | 1085 mm / 42.7 in |
| Seat Height | 805 mm / 31.7 in |
| Wheelbase | 1270 mm / 50.0 in |
| Ground Clearance | 264 mm / 10.4 in |
| Dry Weight | — |
| Wet Weight | 89.8 kg / 198.0 lbs |
| WHEEL SPECS | |
| Front Tyre | 70/100-19 |
| Rear Tyre | 90/100-16 |
| FUEL SYSTEM | |
| Fuel Capacity | 6.06 Litres / 1.60 US gal |
| Fuel Consumption | — |
| Top Speed | — |
A YZ-styled four-stroke trail bike for older kids and beginners, with a 124 cc air-cooled single, five-speed gearbox and big-wheel 19/16-inch setup. It was built over more than two decades in several versions: the LW and L (large wheel), the E and LE with electric start, and the LWE. This page covers the family, with the figures given for the electric-start TT-R125LE (also listed as TTR125LWE 2004 - 2021, TT-R125LE 2007 - 2025, TT-R125E 2005 - 2012, TT-R125LW 2002 - 2009, TT-R125L 2007 - 2008 and TT-R 125 L - LE 2005).
