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2019 Yamaha Tracer 900

As a Yamaha three-cylinder heavyweight model, the Tracer 900 has been well received since its launch, and it has replaced the FJ-09 as the new star in the Yamaha sports wagon product line.

The 2019 version of the Tracer 900 is available in both the Standard and GT versions.

▲Tracer 900 GT

From the side, the Tracer 900 GT is somewhat similar to the MT-09 street car. The engine is a three-cylinder, and the frame design and appearance are similar.

Recently, foreign media also conducted a test drive experience on the 2019 Yamaha Tracer 900 GT.



The test drive location was chosen in the wide canyons of southern Washington State, surrounded by the Klickitat River and backed by Mount Adams, which is also a great sanctuary for the Moss. The Tracer 900 GT is undoubtedly the ideal motorcycle for a personal motorbike.

The new Tracer 900 GT comes standard with a travel side box, an upgraded suspension, cruise control, fast shifting, a full-color TFT display and heated handles.

The Yamaha FJ-09 has won most people's hearts with its engine, sturdy chassis and reasonable design, while the Tracer 900 GT is more focused on fine details and added versatile electronic configuration.

In terms of configuration, the Tracer 900 GT features a new suspension with fully adjustable front fork and adjustable rebound and preload (with new remote adjuster) for a smoother ride and eliminates The roughness of the old model in this respect.

The new model also features a modified slim, lightweight CF die-cast aluminum frame with a longer CF die-cast rocker arm for superior flexibility and high speed stability. Among them, there are three power modes to choose from, which are A (strongest), B (lowest) and Standard (standard), and a three-stage calibration tracking system (Traction Control) is added to reduce the mistake caused by the control throttle. The danger of crashing greatly increases the safety of the rider.

The exterior of the body includes redesigned headlight assemblies, slimmer hand guards, aerodynamic new fairing panels and saddle-shaped cushions.

The GT version comes standard with cruise control and heated handles for better cruise performance. The three-section adjustable windshield is also larger than the old one and can be easily adjusted with one hand. The rear part is equipped with two high and low adjustment seat cushions.

For added comfort, the handlebars are designed to be narrower, while the seat cushion has a new shape and a thicker foam fill, and the ankle support and grip handles of the rear seat have been redesigned.

The new full-color TFT display is exceptionally eye-catching, easy to read cycling data, and has a new menu button on the right handle.

The side boxes on either side of the large frame are not small, each can hold 22 liters and are opened or locked with a key. The new remote preload regulator for rear vibration is located below the silver side panel.

In terms of power, the new Tracer 900 GT is equipped with hydraulic cooling, DOHC, and a three-cylinder engine. The overall performance of the engine is not as good as the usual four-cylinder engine, but the small size makes the body slimmer and easier to drive.

Its maximum power is 84.6kW/10000rpm, and the maximum torque is 87.5Nm/8500rpm. This data has surpassed many public upgraded street cars.

During riding, the seat height of the body is adjustable to provide sufficient legroom and the position in the ride is comfortable and upright. In addition, the windshield and hand guards provide good wind protection.

The Tracer 900 GT features Dunlop D222 tires for medium grip and wear resistance.

When entering the corner, the softness of the front fork and the spring require a little time to get used to. The forks are up to 137mm, but 50mm of them are used for static sinking. This soft rebound can be felt when you use the front brake for the first time, and they will sink immediately.

Therefore, we must first get used to the sinking of the front and rear shock absorbers, and with the rear brakes, we can quickly find the way the car enters and bend, and then the suspension has a 140mm stroke.

It's hard to imagine that the Tracer 900 GT weighs more than 500 pounds, but feels more like a lightweight sports wagon when riding, thanks to its new suspension and longer swing arm. Control and stability are greatly improved without compromising flexibility.

In terms of price, the base price of the 2019 Yamaha Tracer 900 GT is US$12,999 (approximately RMB 88,154).

Unlike other large-displacement versatile models (such as the KTM1290 and BMW Waterfowl), the Yamaha Tracer 900 GT is definitely a mid-displacement road traveler with its impressive power and easy-to-use design, plus Yamaha's precise positioning. The first choice.

Oil seal chain must be durable? Three minutes to show you the chain knowledge

Speaking of the chain of motorcycles, I believe that many car owners are still in a state of ignorance, and think that as long as the car can ride normally, the chain will be fine.

In fact, the condition of the chain is very large, and the impact on the rider's riding safety and riding experience is quite huge. At present, the total chain of forests on the market, how to distinguish the general category of the chain, will undoubtedly be a fog for beginners. Even an old driver may have some wrong ideas without knowing it.

Therefore, it is necessary to re-recognize the knowledge of the chain.

The common chains on the market can be divided into oil seal chains and non-oil seal chains. The so-called oil seal chain has an oil seal in the middle of the inner and outer chain pieces (at the red circle on the picture), and the lubricating oil is wrapped in the middle to achieve the lubrication state of the chain. If there is no such oil seal, it is called a non-oil seal chain.

The oil seal chain has a longer maintenance cycle and better durability in terms of maintenance and durability. At the same time, the oil seal chain has higher torsion and tensile strength, which is more extensive than the non-oil seal chain. However, in terms of price, the non-oil seal chain is relatively dominant, and the maintenance process is relatively simple.



Taking the oil seal chain as an example, it can be roughly divided into six structures: inner chain piece, outer chain piece, pin, bushing, roller, and oil seal.

In the manufacture of chains, the precision and wear resistance of pins and bushings is a very important part. Usually the chain we are talking about is stretched, mainly from the wear of the pins and bushings.

Don't underestimate the gap between this point. In a 100-section chain, as long as each section is stretched by 0.1mm, the 100 knots can add up to one centimeter. And when the chain begins to wear, its wear rate will rapidly increase, so be careful.

Regarding the pin of the chain, in addition to the high precision of machining, it must also be a positive cylinder to maintain a fixed gap with the bushing and reduce unnecessary wear. In addition, chromium carbide must be plated on the outer layer of the pin to increase stiffness and hardness to reduce wear.

While too hard metal tends to become brittle, the center must be properly heat treated to keep the center flexible.  

How to pick the chain

The first thing to notice is the specification of the chain. Find out which chain models are suitable for your car, such as 428, 520, 525 or 530. Then decide the grade of the chain. The original chain will indicate the appropriate displacement level of each chain. .

The next step is to pick the color. The DID oil seal chain has three colors, which are gold, white gold and iron gray. The non-oil seal chain of DID is available in gold and iron.

How to clean the chain

First of all, we must understand that cleaning and maintenance are not the same thing.


The chain is most afraid of getting stuck and requires a lot of effort to loosen it. If it is loosened, the chain will not run smoothly, the engine's power will be consumed on the rotating chain, and even the chain may fall off. Therefore, the usual cleaning of the chain is particularly important.

Before starting cleaning, be sure to prepare an oil pan under the chain. Do not let the oily chain be in direct contact with the ground, causing environmental pollution. Most friends recommend using kerosene to clean the chain, and the effect is quite good.

If it is a non-oil seal chain, it can be cleaned with kerosene. If it is an oil seal chain, it is not recommended to clean with kerosene. The reason is that kerosene may cause the elasticity of the oil seal to deteriorate, causing the oil seal to accelerate aging, and the lubricating oil in the bushing is thrown out to lose the lubricating effect, which also detracts from the life of the oil seal chain.

In addition, acidic substances can seriously damage the chain and are absolutely prohibited. The recommended practice is to buy the original chain cleaner to spray, so the effect will be better.

When cleaning with a chain cleaner, always remember to run in the opposite direction of the chain to avoid accidents.

Chain to be maintained

According to the relevant information, every 500 kilometers or after rainy days, the oil should be applied to the chain. Then, after every two oils, clean it again.

The main lubrication part of the oil is the oil seal, which makes the oil seal always elastic and the lubricity between the bushing and the rotor.

As for what oil to put on, it is usually recommended to purchase a special chain maintenance oil. The general chain maintenance oil is divided into three types according to the state, dry type, wet type and wax type.

summary

Oil seal chains and non-oil seal chains have their own advantages and disadvantages. Which ones need to be purchased depends on their own needs, and the oil seal chain is not a quality responsibility. The second is to pick the chain that matches your model and see the specifications of the chain before buying. In order to ensure the service life of the chain, it is an unavoidable step to carry out corresponding cleaning and maintenance.

Basic principles for troubleshooting of EFI motorcycles

The EFI system is a sophisticated and complex system that has a great impact on the 
engine's running performance. Whether it is the ECU, control circuit or any other sensor or actuator failure, it will affect the engine to some extent. Startability, operational stability, 
power, economy, etc.

The cause of the EFI engine not working or working abnormally may be the electronic 
control system, or it may be a problem other than the electronic control system, or it may 
be mechanical; and the EFI system of different models often has a large Differences, the 
difficulty level of fault checking is also different, so it brings certain difficulties to the 
inspection and elimination of faults.

If we can follow some basic principles of EFI motorcycle fault diagnosis, the diagnosis and 
elimination of faults can be solved. The basic principles for troubleshooting the EFI 
motorcycle can be summarized as follows.

1、From outside and inside

In the event of an engine failure, first check for possible fault locations outside the 
This avoids the fact that it is a fault unrelated to the electronic 
control system, but it does a complicated and time-consuming inspection of the system's 
sensors, ECUs, actuators and circuits, ie the real fault may be easier to find but not found.

Taking the intake system as an example, the ECU mainly controls the fuel injection amount according to the air flow measured by the air flow meter or the intake manifold pressure 
measured by the intake pipe pressure sensor, so the intake system is not tightly sealed and the air leakage may cause the engine. The imbalance causes the idle speed to be unstable, the flameout, the power and the acceleration to deteriorate, and the impact on the system 
is much greater than that of the carburetor engine.
 
When diagnosing the failure of the intake system, first check and eliminate according to the basic diagnostic procedures without electronic control components; if the fault is still not 
eliminated, and confirm that the intake system has failed, first remove the air filter and 
perform visual inspection. Check to rule out some general failure factors.
 
The contents of the inspection include the following items:

(1) Check the air filter element and its surroundings for dirt, impurities or other 
contaminants and replace if necessary.

 (2) Check if the intake pipe is broken, leaking, aging or crushing.

 (3) Check whether the wiring harness of each sensor and computer is loose or 
disconnected, whether the wire is worn or short-circuited between wires, disconnected, 
whether the wire plug connector is inserted in place, and whether there is corrosion.

 (4) Check each sensor for obvious damage.

2、From simple and complex

Possible fault locations that can be inspected in a simple manner are checked first. For  
example, the intuitive diagnosis is the simplest. We can quickly find out some of the more 
obvious faults by using visual inspection methods such as watching, touching, and listening.

Intuitive diagnosis does not identify the fault, and when it is necessary to use the 
instrumentation or other special tools for diagnosis, it should also be checked first.

3、From known to unknown

Due to the complicated structure and working principle of the EFI system, the EFI systems of different models often have large differences. When checking and eliminating the faults 
of the EFI system, it is necessary to understand the working principle and structural 
characteristics of each EFI system. Detailed technical information of the model to be 
repaired.

4、Code Come First

  

As the EFI system becomes more and more complicated, it is more difficult to judge the 
fault location when a fault occurs. In order to facilitate maintenance, modern EFI 
motorcycles generally have fault self-diagnosis function.
 
When the EFI engine is running, after the fault self-diagnosis system detects the fault, it 
stores the fault in the memory of the computer in the code, and alerts the rider through 
the warning light.Therefore, during the overhaul, priority should be given to the fault 
diagnosis interface (socket) of the ECU, and the fault code in the ECU memory is called up 
by the manual jumper method or using the fault diagnostic tool according to a specific 
program, and the light flashes or Displayed directly in digital form by the diagnostic display, helping maintenance personnel quickly and correctly determine the type and extent of the 
fault.
 
After the fault indicated by the fault code is eliminated, if the engine fault phenomenon has not been eliminated, or if there is no fault code output at the beginning, then the possible 
fault location of the engine is checked.

After the troubleshooting, the fault code stored in the ECU memory is also cleared 
manually or manually by means of a specific program to record and store the new fault 
code.If the old fault code is not cleared, when the engine fails again, the ECU outputs the 
old and new fault codes together, so that the maintenance personnel do not know which 
faults are actually present in the engine, and which are faults that have been eliminated 
before, confusing the old and new fault codes. It brings difficulties to overhaul.

5、First Think Then Act

As everyone knows, chaos and bumps can only turn glitch into a big fault, and even cause 
irreparable conditions, causing undue losses. Therefore, it is necessary to first analyze the 
failure of the engine to understand the possible causes of the failure, and then perform the failure check. Only in this way can the blindness of the fault check be avoided: neither 
invalid inspection of the parts unrelated to the fault phenomenon can be performed, and the missing parts of the relevant parts can be avoided and the fault cannot be quickly 
eliminated.

6、First Back up then go ahead

Some components of the EFI system perform well or not. The electrical circuit is normal or not, and is often judged by parameters such as voltage or resistance. If there is no such 
data, the system's fault checking will be very difficult, and often only new parts 
replacement methods can be adopted. These methods sometimes cause maintenance costs to increase and time and labor.


Therefore, during the inspection, the relevant maintenance data of the vehicle should be 
prepared. In addition to collecting and repairing these inspection data from maintenance 
manuals and professional books, another effective way is to use the fault-free vehicle to 
measure the relevant parameters of the system and record it as a comparison parameter 
for the inspection of the same type of vehicle in the future. If you pay attention to doing 
this work, it will bring convenience to the fault detection of the EFI system.



Special Note: The failure of the EFI engine does not necessarily exist in the EFI system. If 
the engine is found to be faulty and the fault warning light is not lit (no fault code is displayed), in most cases, the fault may not be related to the EFI system. In this case, it should be like the engine is not equipped with the EFI system. The basic diagnostics are checked for 
faults.


Otherwise, you may encounter a fault that was not related to the EFI system, but it takes 
a lot of time to check the sensors, actuators and circuits of the EFI system, but the real 
fault is not found.

What do you think about Ninja 400

In November last year, Kawasaki released a new car Kawasaki Ninja 400, which is said to be replacing the Kawasaki Ninja 300, which has not been redesigned for many years.

According to the domestic sales volume of Kawasaki in 2017, although the sales volume in 2016 has increased, the 250-disc segment has been squeezed. After the Dharma representative at the Kawasaki dealership, Kawasaki will cancel the 250-displacement in the future. The model, the 400-displacement model will become the lowest-displacement model for Kawasaki in the country, which means that the Kawasaki Ninja 400 is likely to be introduced in the future.

▲Ninja 400

As a mid-to-low-displacement sports car, the main competitors of the Ninja 400 are the KTM RC390 and the Honda CBR500R. The foreign media also compared the three models, and the Ninja 400 became the winner.

Take a look at the following new changes and you will understand what the Ninja 400 can stand out from.

Larger center console

From the picture, compared to the same level of the car, the new Ninja 400's center console gives the first impression that it is a large space, the outward tilting handle, the huge fuel tank design, you can just right when bending Put your legs close to the tank. Even at high speeds, when you are behind the windshield, the car can give you the illusion of a public upgrade.

The Ninja 400 features a more traditional LCD display with a pointer and LCD negative LCD combination. Even if you ride under the noon light, the display still has good reading performance.

 Block seats bring cramped seating space

The Ninja 400's seat has a block-like layout, which can be seen directly from the picture to the small space, especially the width and height of the rear seat is bound to bring a poor ride experience to the rear passengers. A common problem with sports cars.

The front seats are relatively comfortable, and with their lighter and shorter wheelbase, the car's turn becomes more flexible and lightweight.

In terms of storage, you can also increase the space by installing side boxes on both sides.

Increased displacement

Kawasaki's new Ninja 400 uses a newly developed 8-valve dual camshaft inline two-cylinder water-cooled engine with a displacement of 398cc, an official maximum power of 33.6 kW, and a maximum torque of 38 Nm. Compared to the previous 300cc version, there are many power and torque. Upgrade.

In addition, its EFI system provides clean, accurate throttle response and very linear output feedback. This design increases the ride quality of the rider and passenger.

Equipped with a new suspension

The new suspension and the new frame are the highlights of the new Ninja 400, while the rear suspension setting of the body is soft, which is adjustable for the 5-stage spring preload. It is worth mentioning that the front brake lever is not equipped with adjustable damping design, and the brake lever length is short, but because of its ABS performance can always maintain a good braking effect.

Lower sitting position

Thanks to the design of the narrow seat, the fit between you and the body is increased. Especially at medium and high speeds, you only need to concentrate on the front. Of course, it’s a little uncomfortable to ride in the lower sitting position for a long time, but this is also the charm of the sports car.

Gearbox performs well

For the gearbox, the Ninja 400 is equipped with an international 6-speed transmission and equipped with a slip clutch. When you ride, you know exactly when to shift gears. The damping of the clutch lever is designed to be moderate and allows the rider to quickly Adapted to.

One of the benefits of the slip clutch is that it can effectively suppress the force at the time of high-speed downshifting, making the rear wheel more stable.

Good braking performance

In addition, the Ninja 400 front fork and brake discs have a thicker design than the Ninja 300. The new frame is equipped with new suspensions and brakes, which shows that Kawasaki has invested in the new car without hesitation.

The Ninja 400 also features Dunlop Sportmax GPR-300 sports tires with five-spoke cast aluminum alloy wheels. Provides a good grip on the pavement. 

The Kawasaki Ninja 400 is a good new choice for entry-level and experienced sports car drivers. Its increased displacement, good configuration, almost the same price as the Ninja300, plus Kawasaki's good reputation in sports models.

It is foreseeable that the new Ninja 400 from Kawasaki will be highly competitive in the low- and medium-displacement sports car market.