Shifting a gearbox on a Java motorcycle

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.

how to change gears correctly?

Registration: 10/02/2010 Messages: 85 Topics: 3 From: Krasnodar region, Armavir 23 RUS Motorcycle: Java 638 luxury, 634 in the process of restoration and the legendary “Tulitsa” scooter!

Registration: 10/05/2009 Messages: 14223 Topics: 73 From: Mozhaisk-Ruzskaya group Motorcycles: Jawa 350, Jawa 650, Yamaha Jog NZ

Added after 2 minutes 11 seconds:

Registration: 03/22/2010 Messages: 112 Topics: 5

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

Description of Java 350

A detailed analysis of the parameters of the legendary Soviet bike will help you better understand the features of using such an iron horse.

Design

The simple design of Java was attractive with its brevity. A large headlight in combination with round turn signals looks quite harmonious. The spoked wheels sparkled beautifully in the sun, and some motorcyclists even found inspiration in this.

Appearance

Sometimes Java is called "bench". The motorcycle received this nickname due to the fact that the seat was combined with the rear brake light, and this combination really resembles a comfortable bench. According to the modern classification, the bike belongs to naked bikes - the open engine set the style, and made Java a dream for Soviet motorcycle enthusiasts on a par with IZH.

Weight and dimensions

The length of the Java is 2080 mm, width – 750 mm, height – 1070. Quite familiar dimensions for classic motorcycles with a straight seat. How much a Java 350 motorcycle weighs depends on the modification. The dry weight of the 350-634 is 160 kg. The weight of a Java 350 with a different engine may vary.

The simple design of Java was attractive with its brevity

Modifications and hybrids

Thanks to the large number of fans of the legendary motorcycle, the manufacturer continues to produce and supply iron horses to Russia.

Jawa 350 has three direct successors:

• Jawa 350 Premier. A road motorcycle that is often equipped with an electric starter. The design has become more modern, but the old familiar silhouette is still noticeable.
• Jawa 350 Lux. It differs from the 1991 Java in that it has a reshaped fuel tank, a digital dashboard and a plastic trunk case.
• Jawa 350 Replica. With its name, this modification fully makes it clear what it is. Such motorcycles, which are produced today by a Czech manufacturer, are stylized as Soviet models. Such bikes are bought by those for whom recognition and comfort are more important than speed and power.

Photo gallery

The Java-350 motorcycle has gained considerable popularity among the people. Despite the fact that the motorcycle has not been produced for a long time, it is still in great demand, and isn’t this an indicator of reliability? The appearance of the motorcycle, at one time, met all consumer requirements; you can evaluate it in our small selection.

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.

What causes the speed change?

When the bike's speed selection lever moves, a special drive allows the forks to move. They are designed to move longitudinal couplings. Two gears cannot be engaged at the same time, since a lock (locking mechanism) is used for this. If we look at the example of a three-way box, while one slider is moving, the rest are simply locked with a lock.

At the moment when the clutch responsible for engagement is directed to the gear of a particular transmission, their ring gears meet. They are connected to each other, and their simultaneous rotation occurs. Thus, the gearbox transmits rotational movements from the engine through the cardan shaft to the main gear.