Back to Bike FinderYears: 1969 · 1968 · 1967 · 1966 · 1965 · 1964
Hercules K 103 S
1968Sportbike

Hercules K 103 S

Key specifications

Engine
97 cc
Power
8 HP
Weight
99 kg
Fuel type
petrol
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

Overview

Introducing the 1968 Hercules K 103 S, a quintessential representation of the late 1960s sport motorcycle scene. With its sleek lines and lightweight design, this bike was positioned to attract riders seeking a blend of performance and agility without the weight of larger machines. Known for its unique engineering and German craftsmanship, the K 103 S captured the hearts of motorcyclists who appreciated both its spirited ride and its distinctive style. It’s a classic that radiates retro charm while offering a thrilling experience on the open road. At the heart of the Hercules K 103 S lies a spirited single-cylinder, two-stroke engine, boasting a displacement of 97cc. Producing 8.2 horsepower at 6000 RPM, this engine is designed for nimble handling and a peppy ride. With a top speed of 95 km/h (59 mph), it may not compete with modern superbikes, but its power-to-weight ratio of 0.0828 HP/kg ensures an exhilarating experience for riders who enjoy the thrill of winding roads. The air-cooled engine is fed by a Bing 22mm carburetor, granting it a responsive throttle feel that appeals to enthusiasts who appreciate the raw, unfiltered connection between rider and machine. The K 103 S features a robust single cradle frame and a swingarm rear suspension that together provide excellent stability and comfort, making it a delightful companion for both urban commuting and spirited weekend rides. With expanding drum brakes on both the front and rear, the bike delivers reliable stopping power, though some may find it less effective than modern disc brakes. Its lightweight build, tipping the scales at just 99 kg (218.3 lbs), allows for easy maneuverability, and the classic kickstarter adds an element of nostalgia that many riders cherish. This motorcycle is not just a mode of transport; it’s a slice of history, allowing riders to experience the joy of a simpler time in motorcycling. PROS: - Lightweight design enhances maneuverability and agility. - Classic style and nostalgic features, such as the kickstarter, attract vintage motorcycle enthusiasts. - Spirited engine performance provides a fun riding experience, ideal for sport riding. CONS: - Limited power output may not satisfy those looking for high-speed thrills. - Drum brakes may lack the stopping power and responsiveness of modern disc brakes. - The two-stroke engine requires more regular maintenance and attention to performance than contemporary four-stroke models. The 1968 Hercules K 103 S is not just a motorcycle; it’s an experience that invites riders to embrace the thrill of the ride while celebrating the legacy of motorcycling history.

Technical details

Source specification data

Make
Hercules
Model
K 103 S
Category
Sport
Starter
Kick
Power
8.20 HP (6.0 kW)) @ 6000 RPM
Top Speed
95.0 km/h (59.0 mph)
Fuel System
Carburettor. Bing 22mm
Bore X Stroke
48.0 x 54.0 mm (1.9 x 2.1 inches)
Displacement
97.00 ccm (5.92 cubic inches)
Cooling System
Air
Engine Details
Single cylinder, two-stroke
Transmission Type Final Drive
Chain
Dry Weight
99.0 kg (218.3 pounds)
Power Weight Ratio
0.0828 HP/kg
Seat
Dual
Wheels
Spoked
Rear Tyre
2.75-21
Frame Type
Single cradle
Front Tyre
2.75-21
Rear Brakes
Expanding brake (drum brake)
Front Brakes
Expanding brake (drum brake)
Rear Suspension
Swingarm