The Java 350 motorcycle lineup has always been the most popular in the Soviet Union, and therefore, in 1974, engineers released another modification of the motorcycle - the Java 634. We will look at its main characteristics and advantages.
Even when the new product was released, its official name was Java 350 634/01. But the manufacturer also exported the motorcycle to other markets, and there it received the name Java 350 634/03, which distinguished it from the 01 model by engine characteristics. As a result, the Soviet modification received great demand and the Jawa plant actively refined the model over the next 9 years.
pros
- one of the best motorcycles in the USSR;
- comfortable fit for classic motorcycles;
- feels great at high speed;
- hardy;
- soft suspension.
Minuses
- too high cost;
- high price of spare parts;
- some complain about high fuel consumption.
What is the fuel consumption of the IZH Planet 5 motorcycle?
Motorcycle IZH Planet 5 engines. Official fuel consumption per 100 km. Engine – IZH-75, single-cylinder, petrol, carburetor, two-stroke, air-cooled, displacement – 345 cc, power – 22 liters. pp., fuel support – A-76; gas tank volume – 18 liters; Gasoline consumption – 5-6 l/100 km.
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Technical characteristics of Java 634
The manufacturer initially named the models by their volume, and accordingly the new Java received a volume of 350 cm3 and a two-stroke system. That is, the motorcycle received a completely standard engine from the main model Java 350. The Java 634 cylinder is not one, like other motorcycles, but two, but the lubrication system is considered the disadvantage of the engine. Add oil to Java directly to gasoline in a ratio of 1 to 30.
Above are detailed specifications of the legendary model. As for the engine, it was equipped with an air cooling system and the cylinders were tilted forward by 25 degrees. With a maximum power of 23 horses, the motorcycle could reach a top speed of 128 km/h. Many criticize the high fuel consumption, but in the declared characteristics the minimum figure is 4.5 liters per hundred. Java 634 has technical characteristics that are slightly different in terms of the engine, because the exported modification 634/03 was sold with an engine with a capacity of 19 horsepower. Thus, the manufacturer has made a motorcycle that meets the noise requirements in other countries.
Meet the new Java
This year, the JAVA-250 and JAVA-350 motorcycles of the “559-07” and “360-00” models, popular in the USSR, are being replaced by the Java 350 model 634-01. Motorcycle enthusiasts already know about this new motorcycle from articles published in the magazines “Behind the Wheel” (1973, No. 12) and “Czechoslovak Motor Review”.
How does this motorcycle differ from its predecessors? We asked the representative of the Motokov foreign trade association, Jan BUZEK, to tell us about this.
The new machine was developed taking into account the vast experience gained from operating YAVA motorcycles, of which almost a million have been delivered to the USSR to date. It should be noted that these motorcycles were intended mainly for work on fairly high-quality roads. Nevertheless, as you know, thanks primarily to the exceptional reliability of the engines, JAVA motorcycles have climbed into areas of your vast country for which they were essentially not designed: the off-road conditions of Siberia and the North, the hot sands of deserts, and rocky mountain trails.
Life is life. She is a force to be reckoned with. And it was necessary to change some components in order to better adapt the motorcycles to use in such areas. Many years of work in this direction led to the creation of a new model of the YAVA-350 motorcycle. The changes affected, naturally, primarily the chassis. Let's start with it.
Electrical equipment Java 634
This model used a 6-pole generator with a power of 75 W, and the general characteristics included a Java 634 6-volt battery ignition system. The generator itself was securely fastened to the engine crankcase. Since the Java seat was 2-seater. The battery fit freely there. The dashboard of the motorcycle was quite clear and had 4 lamps of different colors. When the generator is running, the red light goes out, when the turn is turned on, the green light flashes, when the motorcycle is set to neutral speed, the yellow light comes on, and when the high beam is on, the blue light comes on.
Safety during operation was also taken care of by installing both drum brakes with a mechanical drive. The braking process occurs in a non-standard way, because the rear brake can be activated by pressing the pedal located on the right at the bottom of the motorcycle.
Separately, we can highlight a good and comfortable seat, which will seem comfortable and soft even during long journeys. It is possible to remove the saddle. Appropriately sized compartments have been created for tools and convenient battery storage. For better safety, the seat can be locked.
The model also received some sporty details. These include sport-type footpegs and handlebars. As for the steering wheel, it has the ability to be tilted. The manufacturer tried to make the motorcycle as safe as possible, so when you turn the steering wheel all the way to the right. The steering wheel is locked with a cylinder lock.
Close relationship
Almost simultaneously with this model, the CZ 350 motorcycle appeared, differing in the design of the frame, the shape of the fuel tank, and suspension settings. If the Java 350 with a sidecar was normal, then the Chezet 350 was sold only in a single version. The model produced at the Cesk Zbrojovka enterprises was considered to be more sporty, although it had characteristics similar to the Java 350.
The history of the motorcycle
The history of the legendary Soviet motorcycle began back in 1934. Then the first model appeared - Jawa 350 SV. It was a bike with a single-cylinder engine producing 12 horsepower. Its maximum speed was 100 km/h, and it weighed 125 kg. On such an iron horse, Soviet racers won international competitions.
Due to the war, Jawa production was suspended until 1948, but the new Jawa 350 Type 12 did not stay on the assembly line for long. Serial production resumed again in 1954 with the release of Java 350 354/06. From this year, the motorcycle began to enjoy success in the countries of the USSR and took its place in the motorcycle market. The bike was equipped with a two-cylinder engine with a displacement of 350 cc. cm and an air cooling system. Power increased to 16 hp, and then to 18, when new carburetors began to be installed on the motorcycle.
Jawa 350 SV-bike with single cylinder engine
The legend has been modified several times. In 1958, cone shock absorbers were replaced with piston ones. The appearance of Java at that time was considered progressive and even somewhat futuristic. By the way, it is worth remembering the famous monument to Viktor Tsoi - the famous musician sits on Java 354/06.
Video
The motorcycle we are disassembling today has good driving characteristics. The hero of this video shows us how to drive a Java-650, both on a city highway and on rough terrain.
The Czechoslovakian brand JAWA is well known in the USSR. Its two-wheeled motorcycles have become a revered and respected standard for motorcycle enthusiasts throughout the country. And this despite the fact that in our harsh conditions, Java 634 wiring and other electronic components often failed.
Legendary JAWA 350/634
Motorcycles of this brand first appeared in the USSR in 1973 and were sold at a fairly high price (the price started from 950 rubles, depending on the region). A couple of years later, instead of the “634th” model, which had 6V equipment, Czechoslovak motor builders proposed a new generation - “638”, transferred to more promising 12-volt equipment.
Note! It should be noted that there was a shortage of spare parts for motorcycles. Even a detailed wiring diagram for the Java 634 (shown in the photo below) was considered a great success when buying a motorcycle second-hand.
Advantages and disadvantages
Advantages of the legendary Jawa:
- the motorcycle at one time was one of the best on the market, and even now many motorcycle enthusiasts still want to own it;
- the bike boasts a comfortable upright riding position;
- good handling at high speed;
- soft suspension providing comfort while driving on light off-road conditions.
But there are also disadvantages:
- the motorcycle is quite expensive even on the secondary market;
- a lubrication system in which engine oil is added directly to gasoline;
- high cost of maintenance due to prices for spare parts;
- high fuel consumption, which does not suit some owners of this equipment.
Java 350 - legendary Soviet motorcycle
Cult of Java 350
Motorcycles from the above manufacturer were often featured in domestic films.
Even the cartoon character about the hare and the wolf rode one of these. It was these iron horses that received popular nicknames. For example, one of these is “Java the Old Woman”. People simply and skillfully called those models that had a single-cylinder engine “checks.”
I’ll buy Java - that’s what interests our compatriots even in modern times, despite the fact that the latest Jawa 350 634 model was supplied to the USSR back in the late 1980s and early 1990s. Its main differences from the 634 model are the features of the new engine, 12-volt electrics, and the design of the new front fork. The fender at the front of the new motorcycle was painted red. The back one was black.
The above bike model was often called the “Java Penal”. In addition, among the people she also received the nickname “Banana” or “Squirrel”. The latter arose due to the features of the rear spoiler.
Those models that were produced with the index 000 received the popular nickname “Lux” or “Super”. They differed, first of all, in their exhaust pipes, which were longer.
Technical and operational characteristics
At one time, Java simply blew up the motorcycle market, but even now this motorcycle remains relevant despite its respectful age. The Java 350, whose performance characteristics are quite modest today, still remains a relevant motorcycle.
A large headlight looks quite harmonious in combination with round turn signals
Power
The Java 350, whose engine power is 23 horsepower at 5250 rpm, is unlikely to surprise a modern motorcyclist who loves high-speed driving with such modest parameters. However, even at this, the bike is capable of reaching speeds of up to 128 km/h. How many horses there are in Java 350 also depends on the modification. For example, export models were produced only with 19 hp engines.
Dynamics
Thanks to the fact that the cylinders are now made of aluminum, the weight of the bike has decreased. The motorcycle accelerates to hundreds in about 13 seconds, but the weight of the rider is also of great importance here.
It’s a long way from a sportbike, but the purpose of the legendary Jawa is not at all high-speed riding and quick starts from a standing start.
Engine capacity
Java, whose engine capacity is only 343.37 cc. cm, it is still considered a fairly power-hungry bike.
A naked bike is a bike according to the modern classification.
Transmission
The foot-switched gearbox has 4 speeds. The drive to the rear wheel was carried out thanks to a chain.
Motor
The manufacturer is proud of the Java engine, which makes it competitive even today.
Electrical equipment
On Java 350 634 there is a 6-pole generator with a power of 75 W, which is located in the engine crankcase. This model is also equipped with a battery ignition system. The instrument panel is simple and has only 4 indicator lights. When the generator is running, the red light is on, when turning it is green, at neutral speed it is yellow, and the blue indicator is on if you turn on the high beams.
The cost of maintaining a motorcycle depends on the operating conditions.
Fuel consumption
For the Java 350, fuel consumption at a speed of 80 km/h of 4.5 liters is considered the norm. The fuel tank capacity is 17+3 liters.
Power transmission
In order to obtain an optimal gear ratio without excessively increasing the load on the power transmission parts, the dimensions of the drive and driven sprockets of the secondary (rear) gear have been increased to 18 and 52 teeth, respectively. The chain, now consisting of 128 links, is completely covered with a dust-proof casing, which is especially important when operating the motorcycle in rural areas.
The elastic rubber covers of the casing are filled with grease containing graphite. At the same time, they serve as very effective chain vibration dampers, which also increases its durability. New design
Zhukhov allows you to easily control the tension of the chain without disconnecting them, removing any covers, etc.
Review of Java 634
In Soviet times, motorcycle technology was not only fast and reliable, but also universal. Java 350 type 634 was one of these models, because it had the ability to attach a rear or side trailer. It was also possible for the driver and one passenger to ride, because the carrying capacity was 180 kg. With this indicator, some owners could transport the necessary things on a trailer. Of course, the old 634 will not be able to compete with the new Ural motorcycles, but then it could surprise.
Motorcycle chassis
The frame of this model is universal and made of durable components and materials. This was necessary in order for the motorcycle to work well with maximum load capacity and the installed sidecar. The telescopic fork Java 350 634 is made in such a way as to ensure confident movement not only around the city, but also in difficult terrain. Therefore, hydraulic front shock absorbers and a wheel with steel coil springs were installed.
To ensure good stability of the motorcycle on slippery roads, it was decided to install a wide rear fork support. By the way, the pendulum-type fork holds the rear wheel perfectly, which ensures traction.
Model appearance
Outwardly, although it was relatively simple, it still attracted attention . The large headlight, with round turn signals protruding from the sides, and the dashboard wells located on top were combined very harmoniously.
And even though the wheels on the motorcycle were spoked, they sparkled very well in the sun.
The tank of the motorcycle was voluminous, but had a neat shape; in the rear there were quite large pads for the driver’s knees . But the most important thing on the tank was the inscription “Jawa”.
The 638 had a double, flat seat divided in the middle by a strap for the passenger to hold onto. glove compartments under the seat and tank on both sides .
This motorcycle received the nickname “Bench” due to the fact that under the seat there were decorative pads that stretched along the entire seat and ended with a brake light. Because of this, the seat was combined with the rear brake light.
The two-cylinder engine was completely open to view, all its components were clearly visible, although its openness played an important role - the engine was air-cooled.
The advantages of this motorcycle included a very stylish look , which Soviet motorcycles, for example, IZH products, were very far from achieving.
In addition to this, the engine was more high-speed , which made this bike unrivaled. Many also really liked the decision to launch a motorcycle.
Its gear shift foot also served as a kick starter; it was enough to press the foot a little into the gearbox housing and lift it up.
Of all the shortcomings of this motorcycle, only the shortage of spare parts . Like any other motorcycle, it could break down and parts were hard to come by.
In appearance, the ZiD Sova 200 motorcycle differed from the Voskhod in its more modern design, which could help attract Russian buyers.
Motorcycle from Ural, which is distinguished by high power and reliability:
Estimated cost
This motorcycle has not been produced for a long time , but the number of people who want to have it practically does not decrease.
The secondary market comes to the aid of fans of this bike, where there are quite enough offers for the Java-350-638.
And prices for it vary from 25 to 250 thousand rubles.
The design of the Jawa 650 motorcycle is designed in such a way that a person can easily maintain it.
The motorcycle of this model represents a new generation of two-wheeled vehicles made in China.
