What are Motorized Two-Wheelers?

Motorized two-wheelers refer to any vehicle with two wheels that is powered by an engine. This category is diverse, ranging from small mopeds and scooters to powerful motorcycles. In German driving theory, understanding these distinctions is crucial as different types have varying licensing requirements, speed limits, and operational rules. While some, like electric scooters, fall into other classifications, this entry primarily focuses on traditional engine-powered two-wheelers and their direct relatives.

Types and Classifications in Germany

German and EU traffic law classify motorized two-wheelers into several categories, mainly based on engine size (cubic centimeters, cm³) and maximum design speed (km/h).

• Krafträder (Motorcycles): Two-wheeled motor vehicles, with or without a sidecar, with an engine capacity exceeding 50 cm³ (for combustion engines) and/or a design speed over 45 km/h. This includes larger motorcycles.
• Leichtkrafträder (Light Motorcycles): A sub-category of Krafträder, these have a nominal power output of no more than 11 kW and an engine capacity between 50 cm³ and 125 cm³ (for combustion engines).
• Kleinkrafträder (Mopeds/Light Motor Vehicles - EU Class L1e): Two-wheeled motor vehicles with a maximum design speed of no more than 45 km/h. For combustion engines, the capacity must not exceed 50 cm³; for electric motors, the maximum continuous rated power must not exceed 4 kW. This category typically includes mopeds and scooters. Kleinkrafträder are particularly relevant for new drivers due to their lower age requirements and specific safety concerns, as they are often used by younger, less experienced riders.
• Mofas (Motorized Bicycles): These are often treated as a sub-category of Kleinkrafträder, with even lower speed and power limits, often requiring only a Mofa test certificate instead of a full driving license.
• Trikes and Quads: While not strictly two-wheelers, these three- or four-wheeled vehicles often share engine and control characteristics with motorcycles. In Germany, quads are generally driven with a car license (Class B), while trikes may require a motorcycle license (Class A) if the Class B license was obtained after January 19, 2013.

Driving License Categories in Germany

Obtaining the correct license is paramount for legally operating a motorized two-wheeler in Germany:

• Class AM: For Kleinkrafträder (mopeds and light scooters, max 45 km/h, max 50 cm³ or 4 kW). Minimum age is usually 16, though a model trial in some states allows 15-year-olds.
• Class A1: For Leichtkrafträder (light motorcycles, max 125 cm³, max 11 kW, power-to-weight ratio max 0.1 kW/kg). Minimum age 16.
• Class A2: For motorcycles with a maximum power of 35 kW and a power-to-weight ratio not exceeding 0.2 kW/kg. Minimum age 18. After two years of holding an A2 license, an upgrade to Class A is possible after a practical test.
• Class A (unrestricted): For all motorcycles. Minimum age 24, or 20 if upgrading from A2 after two years.

Older German driving license classes (e.g., old Class 1, 1a, 1b, or 3 if issued before April 1, 1980) retain their validity for certain two-wheelers until January 19, 2033.

German Traffic Rules and Specific Considerations

Lane Filtering (Durchschlängeln)

In Germany, it is generally prohibited for motorcyclists to weave between stationary or slow-moving vehicles in congested traffic (often called lane filtering or lane splitting). The road traffic regulations (StVO) do not grant motorcyclists special privileges in traffic jams; they must remain in their lane like other vehicles. Using the emergency lane or hard shoulder is also forbidden. While often tolerated by police in practice due to practical difficulties in enforcement, motorcyclists who cause an accident while lane filtering are typically held partially liable. The ADAC advocates for legalizing lane filtering under strict conditions (e.g., at low speeds on the hard shoulder).

Winter Tire Obligation

Previously, a winter tire obligation existed for motorcycles in Germany. However, due to the impracticality of finding suitable winter tires for motorcycles, this obligation was repealed for single-track motor vehicles on June 1, 2017, via an amendment to § 2 Abs. 3 a Satz 2 Nr. 2 StVO. This means motorcyclists are no longer legally required to use winter tires during icy conditions.

Mandatory ABS

Since January 1, 2016, all new motorcycle types with an engine capacity of 125 cm³ or more sold within the European Union must be equipped with an Anti-lock Braking System (ABS). This significantly enhances safety by preventing wheel lock-up during braking, especially in emergency situations.

Safety and Risks for Two-Wheelers

Motorized two-wheelers, by their nature, offer less protection than cars, leading to a significantly higher risk of severe injury or fatality in accidents. Statistically, the fatality risk for motorcyclists in Germany, relative to mileage, can be around twenty times higher than for car drivers.

Common Stability Problems

Motorcycles are inherently unstable as single-track vehicles. Riders must be aware of potential stability issues:

• Shimmy (Handlebar Wobble): A rapid oscillation of the handlebars, usually between 40-80 km/h, often caused by tire imbalance or fork issues. Generally not considered critical, but unnerving.
• Kickback (Handlebar Slap): Violent, large-amplitude handlebar oscillations that can occur after the front wheel lifts and then makes skewed contact with the road. This can lead to loss of control and is usually prevented by a steering damper.
• Weave (Oscillation): A complex, low-frequency oscillation of the entire motorcycle system, typically occurring above 100 km/h. It involves coupled movements around the yaw, roll, and pitch axes and can be dangerous, requiring a reduction in speed to resolve.

Hearing Protection

Due to wind noise, tire noise, and engine noise, motorcyclists are exposed to high sound pressure levels, which can lead to hearing damage such as hearing loss and tinnitus. Helmets alone do not provide sufficient protection. Wearing specialized earplugs for motorcyclists is highly recommended to prevent long-term damage.

Key Technical Components

Modern motorized two-wheelers feature advanced technology to enhance performance, safety, and comfort:

• Engines: Primarily Otto-cycle (petrol) combustion engines, but electric motors are becoming more common. Engines vary widely in cylinder count and arrangement.
• Transmission: Most motorcycles use sequential manual gearboxes with multi-plate clutches (wet clutches are common). Dual-clutch transmissions (DCT) are available on some models, offering automatic gear changes. Scooters often use continuously variable transmissions (CVT).
• Drive Systems: Chain drives are common for their cost-effectiveness and adaptability, but require maintenance. Belt drives offer quieter, maintenance-free operation, while shaft drives (cardan drives) are highly durable and maintenance-free, though heavier and more complex.
• Braking Systems: Modern motorcycles almost exclusively use hydraulic disc brakes. ABS is now mandatory for new motorcycles over 125 cm³ in the EU, greatly improving braking safety.
• Suspension: Telescopic forks are the predominant front suspension, while swingarms with shock absorbers are standard for the rear, often with a single central shock for sportier models.
• Controls: A typical German motorcycle has the gear shift on the left foot, clutch on the left hand, throttle and front brake on the right hand, and rear brake on the right foot. Various switches for lights, indicators, horn, and engine start are located on the handlebars.