Across 12 covered model years from 1948 to 1959, the Harley-Davidson S-125 motorcycle has a listed dry weight of 200 lb (90.7 kg).
Harley-Davidson S-125 weight overview
This sits at the very light end of motorcycle mass, which is especially useful when the bike has to be moved around by hand or held on uneven ground. The comparison uses dry weight because a usable wet/running figure was not supplied, so the actual ready-to-ride motorcycle will be heavier.
Very Light Motorcycle
How heavy is the Harley-Davidson S-125?
dry weight
Using a model-level dry weight comparison, the Harley-Davidson S-125 is lighter than about 96.4% of 14 Harley-Davidson allround models with compatible weight data.
Dry weight
Bike + rider total weight
These totals use the model’s representative dry weight. They exclude riding gear, luggage and a passenger.
Harley-Davidson S-125 weight & related specs
| Model years covered | 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959 |
|---|---|
| Dry weight | 200 lb (90.7 kg) |
| Engine displacement | 125 cc to 165 cc |
| Power | 3 hp |
| Fuel capacity | 1.75 US gal (6.62 L) |
| Full-tank fuel weight (estimated) | 10.9 lb (4.9 kg) |
Weight changes by model year
Useful weight calculations
| Horsepower per 100 lb | 1.5 hp / 100 lb |
|---|---|
| Pounds per horsepower | 66.65 lb / hp |
| Displacement per pound | 0.63 cc / lb to 0.83 cc / lb |
| Weight per 100 cc | 121.2 lb / 100 cc to 160 lb / 100 cc |
| Fuel weight as % of bike weight | 5.4% |
| Weight with full tank | 210.8 lb (95.6 kg) |
What the weight numbers tell you
Harley-Davidson S-125 weight FAQ
How heavy is the Harley-Davidson S-125?
Listed dry weight is 200 lb (90.7 kg). Because no usable wet/running figure was supplied, treat that as a lower starting point rather than the exact on-road weight.
Is the Harley-Davidson S-125 heavy compared with other Harley-Davidson allround models?
It is on the lighter side in this dataset. Its representative dry weight sits around the 4th weight percentile among 14 Harley-Davidson allround models, meaning most compatible models are heavier.
Does the Harley-Davidson S-125 weight change by model year?
Not in the usable weight data on this page. Across the covered 1948-1959 years, the supplied weight figure remains the same where comparable values are available.
How much does the Harley-Davidson S-125 fuel weigh?
The listed tank capacity is 1.75 US gal (6.62 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 10.9 lb (4.9 kg). That is an estimate for fuel mass, not an official Harley-Davidson curb-weight calculation.
How heavy is the Harley-Davidson S-125 with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 380 lb (172.3 kg) using the representative dry figure. Gear and luggage would add more.
How much horsepower does the Harley-Davidson S-125 have per 100 lb?
Where compatible power and weight figures are available, it works out to 1.5 hp per 100 lb.
Can I treat the Harley-Davidson S-125 dry weight as curb weight?
No. The usable figure is dry weight, so it excludes at least some operating fluids. Dry weight plus the estimated full fuel load is about 210.8 lb (95.6 kg), and oil/coolant or definition differences may add more.
What is the Harley-Davidson S-125 full-tank weight estimate?
Using the listed dry weight plus the calculated fuel mass, the estimated weight with a full tank is 210.8 lb (95.6 kg). That still may not equal official curb weight because dry-weight definitions can exclude other fluids or equipment.
How many cc does the Harley-Davidson S-125 have per pound?
Engine displacement relative to bike weight is 0.63 cc per lb to 0.83 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
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 Harley-Davidson website.