For the 1978 model year, the Yamaha DT 125 MX motorcycle has a supplied wet/running weight of 224.9 lb (102 kg) and a dry weight of 209.4 lb (95 kg).
Yamaha DT 125 MX weight overview
This is a genuinely light bike. That usually makes parking, pushing it around a garage and catching small low-speed balance errors easier than on larger motorcycles.
Very Light Motorcycle
How heavy is the Yamaha DT 125 MX?
wet weight
Using a model-level wet weight comparison, the Yamaha DT 125 MX is lighter than about 75.7% of 68 Yamaha enduro/off-road motorcycles with compatible weight data.
Dry vs ready-to-ride weight
Bike + rider total weight
These totals use the model’s representative wet weight. They exclude riding gear, luggage and a passenger.
Yamaha DT 125 MX weight & related specs
| Model years covered | 1978 |
|---|---|
| Wet / running weight | 224.9 lb (102 kg) |
| Dry weight | 209.4 lb (95 kg) |
| Engine displacement | 123 cc |
| Power | 14 hp |
| Torque | 7.2 lb-ft (9.8 Nm) |
| Fuel capacity | 1.85 US gal (7 L) |
| Full-tank fuel weight (estimated) | 11.5 lb (5.2 kg) |
Useful weight calculations
| Horsepower per 100 lb | 6.23 hp / 100 lb |
|---|---|
| Pounds per horsepower | 16.06 lb / hp |
| Torque per 100 lb | 3.21 lb-ft / 100 lb |
| Displacement per pound | 0.55 cc / lb |
| Weight per 100 cc | 182.8 lb / 100 cc |
| Fuel weight as % of bike weight | 5.1% |
| Weight with full tank | 220.9 lb (100.2 kg) |
What the weight numbers tell you
Yamaha DT 125 MX weight FAQ
How much does the Yamaha DT 125 MX weigh?
For the model years covered here, wet/running weight is 224.9 lb (102 kg), while dry weight is 209.4 lb (95 kg). Do not treat dry and wet figures as interchangeable.
How does the Yamaha DT 125 MX weight compare with similar Yamahas?
Relatively light. On a model-level comparison, it is lighter than about 75.7% of 68 Yamaha enduro/off-road motorcycles with the same weight basis.
What does a full tank of gas weigh on the Yamaha DT 125 MX?
A full tank works out to about 11.5 lb (5.2 kg) from the listed 1.85 US gal (7 L) capacity. Actual fuel density varies slightly, so treat it as a practical estimate.
What does the Yamaha DT 125 MX weigh with a 180 lb rider?
The approximate combined total is 404.9 lb (183.6 kg) with a 180 lb rider, based on the representative wet/running weight used on this page.
Is the Yamaha DT 125 MX strong for its weight?
The calculated range is 6.23 hp per 100 lb. This ratio is usually more informative for acceleration comparisons than horsepower alone. That places it around the 29th percentile within the compatible Yamaha enduro / offroad power-to-weight comparison.
What is the estimated Yamaha DT 125 MX weight with a full tank of gas?
The page calculates about 220.9 lb (100.2 kg) with a full tank by adding the listed fuel mass to the dry figure. Treat this as a practical estimate, not an official Yamaha curb-weight number.
How much heavier is the Yamaha DT 125 MX wet than dry?
Available years with both measurements show about 15.4 lb (7 kg) added between dry and ready-to-ride figures. Fuel explains part of it, while oil, coolant and specification definitions can explain the rest.
What is the Yamaha DT 125 MX torque-to-weight ratio?
Available data gives 3.21 lb-ft per 100 lb. That ratio helps explain how strong the engine is relative to the bike’s mass, especially at lower speeds.
How large is the Yamaha DT 125 MX engine for its weight?
The model has about 0.55 cc per lb in the available data. This simply shows how much engine displacement there is for each pound of motorcycle weight.
Motorcycle specifications can vary by model year, market, equipment and the exact dry/curb-weight definition. Calculated fuel-weight and ratio figures on this page are estimates derived from the supplied specifications. Confirm critical figures in the owner’s manual or on the official Yamaha Motorsports website.