pocket bike

This article or the following section is not adequately provided with supporting documents ( e.g. individual evidence ). Information without sufficient evidence could be removed soon. Please help Wikipedia by researching the information and including good evidence.

Typical pocket bike

As Pocket Bike (English "pocket bike") motorcycles are called, the 110 cm x 50 cm x 50 cm not exceed the dimensions. They are to be distinguished from the larger minibikes , which have at least 50 cm³ displacement. Pocket bikes are optically based mostly on existing motorcycles.

technology

engine

The majority of pocket bikes are powered by two-stroke engines with a capacity of 39 to 50 cm³, as they offer compact, simple technology. Both air-cooled and water-cooled motors are used, which, regardless of the design, are usually started with a pull-wire , more rarely with an electric starter. The engines are fed with fuel via carburettors. Flat slide and round slide carburetors are common . Occasionally, vacuum diaphragm carburetors are also used. Oil-cooled four-stroke engines from various manufacturers with a displacement of 80 to 110 cm³ are increasingly being used.

Clutch and drive

Usually pocket bikes do not have complicated manual transmissions like their big counterparts . Instead, the drive energy is transmitted via a centrifugal clutch to a small pinion , which transfers the energy to the chainring via a drive chain . This drive technology is usually referred to as automatic in data sheets. Possible gear ratios are a pinion with six to eleven teeth and a chainring with 60 to 80 teeth. The dirt bike has another type of drive. The power of the motor is transferred to a centrifugal clutch, then to a gear reduction and finally, as in the pocket bike, to a small pinion that transfers the power to the rear wheel pinion via a drive chain.

Brakes

• Front-wheel disk brakes (rigid or floating manner) to 160 mm in diameter, single or double glazing, usually with floating Einkolbenbremssattel stored via a cable actuated
• Rear wheel disc brake (rigidly mounted) up to 110 mm in diameter, but this is usually a floating single-piston brake caliper operated by a cable

There are now also hydraulic brake systems with multi-piston brake calipers.

Motorsport

A pocket bike is almost always a motor sport device and should therefore only be ridden with suitable safety equipment ( helmet , gloves, leather suit ).

There are numerous championships in the individual countries (for example the German championship) as well as a European championship. The regulations of the German championship divide the drivers into four classes:

• In grades 1 and 2, students up to the age of 16 take part with machines with an output of up to 7 hp.
• Class 3, Senior Mini, from 16 years, two-stroke up to 50 cm³ and four-stroke up to 90 cm³ without power restrictions
• Class 4, Senior Midi, like class 3, but with midibikes (slightly larger).

Only brand-name bikes from well-known manufacturers are permitted in classes 1 to 4. There is also class 5, Chinabikes, which is rarely advertised.

On the kart track

Legal situation in Germany

Driving pocket bikes in public traffic is mostly not allowed. As of 2020, it is not possible to obtain a license in Germany because the vehicles almost never meet the requirements of the road traffic licensing regulations . This means that there is no insurance coverage . In addition, a driver's license (usually class A or A1) is always required on public roads. Anyone who drives such a motor vehicle without registration, insurance cover or a driver's license in public road traffic is liable to prosecution; it is not allowed to operate it on field and forest paths and in parking spaces that are not completely cordoned off.

Web links

Commons : Minibikes  - collection of pictures, videos and audio files

Wiktionary: Pocketbike  - explanations of meanings, word origins, synonyms, translations

• Online consumer portal of the Bavarian State Government on pocket bikes

Please note the information on legal issues!