1975 Honda CB125S PicturesThe Honda CB125s is a 122 cc motorcycle manufactured by Honda from 1971-1975 (1973-1985 in the US). It features an overhead camshaft (OHC) engine with a 9500 rpm redline and offers 100 mpg, quite astonishing for its period.
1975 Honda CB125S Vintage
The following table contains detail information on 1973 Honda CB125 specs. Herein you will find detail description about the motorcycle engine system, dimension, frame, lubrication and fuel system, cooling and combustion, ignition and starter system, lubrication and electrical specs.
ENGINE
| Fuel | Gasoline (petrol) |
| Cooling system and cycles | Air-cooled, 4-stroke |
| Number of cylinder & mounting angle | 2 cylinders, parallel 30º up from horizontal |
| Valves | Overhead type |
| Combustion chamber | Semi-spherical |
| Cylinder capacity | 0.1246 liter (7.6 cu in) |
| Bore x stroke | 44 x 41 mm (1.73 x 1.61 in) |
| Compression ratio | 9.0 |
| Compression | 10 kg/ sq cm (141.9 psi) |
| Max. Output | 15 hp/10500 rpm |
| Max. Torque | 1.07 mkg (7.7 ft lbl/9200 rpm) |
| Starting | Electric motor and kick system combined |
| Ignition | Battery spark |
| Spark timing | 5º to 45º before top dead center |
| Spark coil model | R208 29700-097 CM12 |
| Spark coil Manufacturer | Kokusan Denki, Nihon Denso, HItachi Seisakusho |
| Carburetor type and number | Piston valve type, 2 each |
| Carburetor manufacturer | TK Kikaki, Keihin Seiki |
| Air cleaner type | Filter paper |
| Air cleaner manufacturer | Tokyo Roki |
| Fuel Tank capacity | 10.5 liter (2.8 US gal) |
| Lubrication system | Pump and splash system combined |
| Type of oil pump | Plunger |
| Type of oil filter | Wire mesh and centrifugal system combined |
| Lubricating oil capacity | 1.0 liter (.27 US gal) |
| Battery model and number | MBW 3 – 12 C, 1 each |
| Battery voltage/capacity | 12V 9Ah |
| Charging generator model | EG 19 37000-024 K107 |
| Charging generator manufacturer | Kokusan Denki, Nihon Denso, Hitachi Seisakusho |
| Starting motor model | CC03 28000-111 S106 |
| Starting motor manufacturer | Kokusan Denki, Nihon Denso, Hitachi Seisakusho |
| Transmission system | Gear system |
| Reduction ratio | 3.700 |
| Clutch model | Wet multi-plate |
| Transmission model | Constant engaged gear system |
| Shifting | Left foot system |
| Gear ratio: | |
| 1st | 2.769 |
| 2nd | 1.778 |
| 3rd | 1.318 |
| 4th | 1.040 |
DIMENSION & WEIGHT
| Overall length | 1.947 m (6.39 ft) |
| Overall width | 0.745 m (2.45 ft) |
| Overall height | 0.990 m (3.25 ft) |
| Wheelbase | 1.277 m (5.08 ft) |
| Ground clearance | 0.145 m (0.48 ft) |
| Weight unloaded | 127.0 kg (279 lb) |
PERFORMANCE & Others
| Max. Speed | 130 km/h (81 mile/hr) |
| Fuel consumption ratio | 65 km/lit (40 mile/gal) |
| Climbing ability | 18º30′ |
| Min turning radius | 2,120 mm (7 ft) |
| Braking distance | 7m (at 35 km/hr) or 23 ft (at 22 mile/hr) |
| Steering angle | 40º (right and left) |
| Length of handlebar | 0.678 m |
| Running caster | 64º |
| Running trail | 0.086 m (0.25 ft) |
| Tire size front | 2.50-18 |
| Tire size rear | 2.75-18 |
| Brake front | “Two leading” internal expansion |
| Brake rear | Leading, trailing internal expansion |
| Front suspension | Telescopic |
| Rear suspension | Swinging arm |
| Front shock absorber | Coil spring with oil absorber |
| Rear shock absorber | Coil spring with oil absorber |
| Head lamp model | ASS 13 |
| Manufacturer | Stanley Electric |
| Lamps voltage/capacity | 12V 30W |
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