Contract engines for Honda motorcycles: what are they?
Honda is a Japanese manufacturer of some of the most reliable, economical and fastest motorcycles on the world market.
The company presents several models of motorcycles: classic, sports and dual-use models. Honda also produces scooters, mopeds and four-wheeled all-terrain vehicles. With proper and careful operation, Honda engines are practically invulnerable, but they have their own characteristics and requirements. For example, some models of this brand are characterized by a high degree of boost; such engines need replacement much more often than others. Also, Honda engines are quite difficult to repair and are demanding on the quality of the oil. Oddly enough, this primarily applies to highly qualified engines. But in general, Honda engines are of high quality and have minimal defects, which distinguishes them from spare parts of other brands.
offers a large selection of high-quality contract engines of the Japanese brand “Honda”. The advantage of Japanese contract engines is that they are used in different road conditions: on smoother and even roads. Moreover, engines in Japan are changed much more often and they simply do not have time to fail, maintaining good performance.
Motorcycle engines - domestic and imported motorcycle engines for walk-behind tractors, motorized towing vehicles, cultivators, motorcycles and many others. etc. You can buy a motorcycle engine from us with delivery to any city in Russia.
If you want to buy a motorcycle engine
, this online store offers a wide variety of models. Domestic and imported products for walk-behind tractors, towing vehicles, cultivators, motorcycles and the like are delivered to any Russian city.
Agromotor engines are reliable equipment for motor cultivators and motorized towing vehicles. Their power is on average 10 hp, the engine type is four-stroke. The weight of individual models starts from 15 kg and reaches 31 kg. The most powerful engine models
equipped with manual and electric starter. They are designed for professional walk-behind tractors, gas generators, etc. They can be used both in summer and winter - they start up equally easily.
Internal combustion engines
B&S (Briggs & Stratton) are made in the USA. They are designed for the operation of walk-behind tractors and garden equipment (lawn mowers, cultivators, garden vacuum cleaners). Four-stroke carburetor engines are air cooled. Their power varies from 3 to 25 hp. Some models are more suitable for amateurs (Quantum), others - for professionals (Vanguard).
Gasoline engines
Honda differ in the number of cylinders, valve arrangement, cylinder group design, different shaft designs and the presence of a gearbox. The capabilities of the engines depend on these indicators. You can even install them on power equipment. They are extremely in demand all over the world. Their production reaches 4 million copies per year.
Engines from the largest Chinese manufacturer Lifan have a fairly low price and are not inferior in quality to other models. Typically engine power
- about 5 hp, but there is also a monster Lifan 2V77F with 18 hp. for installation on buggies, homemade units and all-terrain vehicles.
MTR engines will be absolutely indispensable in winter for snow removal. They may seem heavy, but in difficult times they will not let you down. They are distinguished by their breadth of application and ergonomics.
Robin Subaru engines are very strong, reliable and durable. The original air purification system, the use of a steel crankshaft on ball bearings and the presence of an electronic ignition system ensure a long service life of the motorcycle engine. This technique works almost silently.
Ruslight engines are similar to the corresponding Honda units. They have average power and are equipped with a reduction chain variator. It is recommended to install them on walk-behind tractors, cultivators, snowmobiles, karts, etc.
How the Japanese invented an engine with oval pistons
In 1978, Honda, after a 12-year break, decided to return to the Moto GP World Championship, where at that time motorcycles equipped with 2-stroke engines participated and dominated.
At this stage, it is important to note that for the same displacement, a 2-stroke engine has more power than a 4-stroke engine, and a 2-stroke engine also revs faster.
However, despite all the obvious advantages of motorcycles equipped with 2-stroke engines, Honda engineers were true to tradition and believed that the engine should only be 4-stroke, since it is more economical, environmentally friendly, more reliable, but most importantly, a 4-stroke engine has great torque at low and medium speeds. However, engine power is no less important, and for a 2-stroke engine, as I wrote above, it is almost twice as much as for a 4-stroke.
To make a 4-stroke engine as powerful as a 2-stroke engine of the same displacement, it is necessary to increase either the number of cylinders or the number of valves per cylinder, which is impossible to do with a cylinder size like a motorcycle engine.
Therefore, Honda engineers took the path of least resistance and developed an 8-cylinder V-twin engine, which in its characteristics was not inferior, and in some ways even superior to 2-stroke ones.
Honda's return to Moto GP with such an engine in its arsenal should have been triumphant, but the organizers unexpectedly amended the technical regulations, according to which the maximum number of engine cylinders should now not exceed four. This stumped Honda engineers, but not for long as they quickly found a solution.
But the solution turned out to be simple, and its essence was to combine two cylinders into one, making them oval, which would preserve volume and make it possible to increase the number of valves per cylinder. This is how the 4-cylinder V-shaped Honda engine with oval pistons and two connecting rods per piston actually appeared.
Honda NR oval piston engine
Oval pistons of the Honda NR engine
This 4-cylinder, 32-valve V-twin engine with a volume of 500 cubic centimeters had a power of 125 horsepower and was capable of spinning up to 20,000 rpm, and the first motorcycle to be equipped with this engine was the Honda NR500. Unfortunately, despite the superior performance of the Honda NR500 in Moto GP, it was less successful than the conventional 2-stroke-powered Honda NS500.
Honda NR500
Despite the complete failure of the Honda NR500 in Moto GP, Honda engineers did not stop there and continued to experiment with engines of this type. So in 1983 they developed a 2-cylinder V-shaped engine with oval pistons with a volume of 250 cubic centimeters, but it was never shown to the general public, and in 1991 one of the most exotic motorcycles on the planet, the Honda NR750, appeared.
Honda NR750
This motorcycle was equipped with a 4-cylinder, 32-valve V-engine with oval pistons with a volume of 750 cubic centimeters and a power of 160 horsepower, which in the production version was limited to 125 horsepower.
A total of 322 units of the Honda NR750 were produced, which is why it is still considered one of the rarest and most expensive motorcycles on the planet.
Here's the story. Did you like the post? Share!
The history of Honda motorcycles on the sports Olympus
A young team of athletes from Japan first encountered the Tourist Trophy track in 1959 on 125 cc, two-cylinder Honda motorcycles. The best result this time was sixth place, and Soichiro Honda decided to use the experience of foreign riders in the competition. This decision bore immediate fruit, and in 1961, in the 125 cc class, the Australian athlete Tom Phillis won the world champion title, and the Englishman Mike Hailwood, riding a motorcycle of the same series only on a 250 cc bike, brought another gold medal. As a result, in the period 1961-1967, international professional racers brought the company 16 championship medals in various classes from 50 to 125 cm3, and in classes 250 - 350 cm3. Almost all Honda racing motorcycles of that time were equipped with multi-cylinder, air-cooled four-stroke engines. Winning titles provided the opportunity to rapidly attack foreign markets. 1959 Honda opens its first division in the United States; 1961 - in the European part. An assembly plant was launched in Belgium in 1962. Already in the early 60s, the Honda concern took first place in the production of various photographic equipment and since that time has not yielded its leadership to anyone. The first model of a sports motorcycle that absorbed all the racing experience was the Honda CB450, which debuted in 1965. The motorcycle was equipped with a 44 cc, two-cylinder in-line power unit with a power of 43 hp, which was installed on a closed duplex tubular frame. For the first time in practice for production Honda CB450 models, the engine design had two overhead camshafts with original torsion valve springs. A fairly heavy 187-kilogram motorcycle accelerated to 180 km/h. Acceleration to “hundreds” took 5.6 seconds, ahead of the fastest British 750 cc motorcycles at that time. In March 1969, a significant event took place in the history of Honda: serial production of the new Honda CB750 model was launched, which eclipsed all its competitors. The Honda SV750 had an in-line 736 cm3, four-cylinder engine with a single overhead camshaft and air cooling and developed a power of 67 hp, the device accelerated to 200 km/h. The motorcycle is equipped with a five-speed gearbox and an electric starter. And most importantly, technical innovations did not greatly affect the cost of the motorcycle; the price turned out to be not much higher than popular British devices, thereby Honda motorcycles remain competitive. The Honda CB750 was a huge success; in subsequent years, it acquired modifications, starting with 347 and ending with 544 cc engines and radically changed the idea of powerful motorcycles.
The concern did not ignore the development of models with small engine volumes. To order from Parko Tokyo in 1960, an experimental 49 cc model was produced on 5-inch wheels of the Super Cub micromotorcycle on rigid suspensions. After some time, the Monkey model was launched into production. 1969 marked the debut of the Dax minibike (translated as Duck) with 10-inch wheels with soft suspension and an engine capacity of 49 or 72 cm3. In 1966, a 49 cc four-stroke Little moped with an original horizontal cylinder went into production; the motor was mounted next to the rear wheel hub. In 1969, the CD series of road motorcycles received upgraded engines with vertical cylinders, the volume of which ranged from 124 to 325 cm3 with a closed tubular frame. Increasing demand for off-road models encourages the development and production of vehicles in this category. And in 1970, the SL series of dual-purpose motorcycles came out, having a lightweight duplex frame on which a one- or two-cylinder four-stroke power unit with a volume of 72 to 325 cm3 is mounted.
