Removing the restrictions results in an output of around 7 BHP at 9000RPM, like the US version. The redline is at 6000 RPM, as the engine can't turn higher revs with the restrictors in place. No numbers on BHP or torque are given in the UK specs, but to comply with the 30 MPH regulation that is enforced in Europe, it is likely that it produces around 2,5 BHP at 5500 RPM.
The idle speed is 1200 RPM, but the de-restricted versions will stall if it isn't raised to 1400 RPM. A Keihin HM 16-6 carb, which is a 13mm diameter, with a #62 main jet, the restricted engine will choke with the #75 or #80 jet that is commonly used in the de-restricted versions. Fines are about $1,500 if you get caught driving a de-restricted or tuned example. Needless to say, 85% of the mopeds in Europe are de-restricted or tuned. The bike can be impounded by the police if it is capable of reaching speeds above 30 MPH. It is highly illegal to remove those restrictions. This is done by restricting the diameter of the first part of the exhaust, and another restrictor is placed between the airbox and the carburetor. In Europe, a 50cc bike is considered a moped, and is restricted to a designed top speed of 30 MPH, or about 48 km/h. It never was a big hit there, as the French preferred French mopeds over Japanese ones. The MB5 was never officially imported in France, but a few hundred were imported by privateers that bought one in another country. The UK, Belgium, Germany and Spain got 5-speed gearboxes from the end of 1979. Most of them are modified to 5-speed gearboxes, as this improves acceleration. The 4-speed gearbox was mainly used in the Netherlands throughout the MB5's entire production. Later models had a 5-speed like the US version. All of some of the 1979 models had a 4-speed transmission, or gearbox as some call it. The motors are where the differences start. Spotting an MB5 is hard, and finding one with the original fairing, is nearly impossible. Clip-on style handlebars for the euro version instead of standard bars on the US version. The euro model did get a fairing around the headlight with a very small windshield incorporated.
Most all of the chassis and appearance parts are the same as the USA model. They came in black, red, and white with a blue stripe. The Honda MB5, more commonly know as a MB50, was produced in Europe for 3 years, 1979 to 1981. Starting Vin # for the Honda MB5 is: JH2AC010*CK000011 The original price was $598, what a steal! The Honda accessory luggage rack was available and is kind of a rare find today. Hydraulic front disc brake and a simple drum in the rear. Dampener rod forks in front and twin 5-position adjustable preload shocks on a conventional swingarm in the rear. 18 inch 3-spoke ComStar mag-style wheels. Speedometer and tachometer (both cable driven) were standard.
#1982 honda atv engine oil manual
5-speed transmission with a manual clutch, and chain driven final drive. 16mm Keihin carburetor with manual choke. The engine used oil injection so you didn't have to premix the gas and oil. It had a 49cc, 2-stroke, air cooled engine with a counter-balancer for minimal vibration. The colors it came in were black body and frame and a red stripe, and red body and frame with a blue stripe. The model designation is MB50C here in the US. The Honda MB5 was imported for exactly 1 year here in the USA, 1982.
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