Recently, Chunfeng Guanwei has continuously warmed up the upgraded model of the 250SR track version codenamed MY22, before the Mo friends speculated that the "one drop" of selling Guanzi would be the price or seat high, until March 6, the spring wind revealed the answer, which is consistent with the speculation of Ouye bacteria - not the price, but the weight of the car.
Today Chunfeng officially released the 250SR track version of MY22, the official price of 21980 yuan, I don't know if it accurately hit the expectations of motorcycle friends?
No matter how it is sprayed on the Internet, Oye mushrooms are still convinced that Spring Wind is one of the manufacturers that understand the psychology of users the most, because facts speak louder than words, and the sales since the launch of the 250 series are enough to prove that Spring Wind has eaten the market very thoroughly.
So today we will not talk about the price (this price I really do not have a good interpretation, on the race road version of the high 300 ... ), but to explain in detail the necessity and advantages and disadvantages of this "nine rises and one fall".
One liter: The power and torque of the engine have been improved on the basis of the original.
I made a table for everyone to compare intuitively.
The maximum power of the MY22 version is increased by 1 kW at 9750 rpm; the maximum torque is advanced to 7250 rpm and increased by 0.5 nm compared to the original, that is, the torque peak reaches 22.5 nm at 7250 rpm.
According to the public data of the Ministry of Industry and Information Technology, the engine models of the 250SR and 250SR MY22 vehicles are both 172MM-2A, and the actual displacement is also 249ml. From the values of the bore and actual displacement, it can be known that the bore and stroke of this engine have not changed, and the power and torque increases are through the re-tuning of the ECU. The maximum power of the MY22 version is increased by 1 kW at 9750 rpm; the maximum torque is advanced to 7250 rpm and increased by 0.5 nm compared to the original, that is, the torque peak reaches 22.5 nm at 7250 rpm.
By the way, the engine model can get the basic information of the engine. Take the chunfeng 250 machine model "172MM-2A" as an example, where "1" represents a cylinder and "72" represents a cylinder bore unit of 72mm.
Two liters: vehicle vibration suppression optimization.
According to Chunfeng's official description of vibration suppression optimization, this time it is an improvement in the assembly structure of the body cover, not the vibration suppression of the engine itself.
When the vehicle is running, the vibration caused by the engine will cause the plastic coverings to collide and rub against each other, or the plastic coverings and the frame will collide and rub, and even produce abnormal noises, which makes people feel that the vehicle is not tidy, loose and collapsed, and the experience is relatively poor. Domestic horizon sports car because of poor workmanship, the sound is already strange, often by the Moyou joke is a shell car, in addition to the horn does not sound everywhere else is ringing.
In the eyes of new users, this small move of Spring Wind may be dwarfed by a single rocker arm and a fixed wind wing, but we stretch the timeline to see that Spring Wind can begin to optimize the product from the rider's sense of experience or product refinement, which I think is even more gratifying than the single rocker arm and the fixed wind wing, that is, the details see the original intention.
Three liters: the rear shock absorber is more "hard".
The upgrade of shock absorption, to put it simply, is that the rear shock absorption is harder, and there is a sacrifice in the daily travel comfort, which enhances the performance in the corners, so that MY22 has the conditions to do some more extreme corners and provide more stable support.
This practice pushes the 250SR to the serious imitation one step further, the smaller the rear shock bounce, the higher the accuracy of the control in the corner, but it is a commercially available model after all, and the actual performance still depends on the adjustment of the manufacturer.
Four liters: the braking force is increased.
In most models that do not have ABS or ABS can be closed, rear wheel locking is not a difficult thing, which shows that the braking force brought by the caliper has always been excessive, so why does the MY22 have to increase the brake disc diameter?
Because of the multi-piston or larger disc diameter brake kit, the precise purpose is to keep the disc temperature as uniform as possible, thereby reducing the thermal decay of the disc and the brake pads. A simple example is a pound of iron and a half pound of iron, and when the temperature rises by one degree at the same time, the heat required is not the same. Therefore, increasing the diameter of the rear brake disc is conducive to improving the rear brake performance and obtaining better braking effects in small bends and sharp bends.
Five liters: Improved gear shifting comfort.
The shift stroke of the 250SR is large, and the gear shift experience is not strong and the suction feeling is slightly jerky, let's take a look at the principle of the gear shift mechanism.
Shift mechanism as shown in the gif, the manufacturer should have done a certain optimization in the escapement mechanism and the two fixed shaft gear wheel train, the gear shift stroke is also directly related to this mechanism, and when you can see the real car, just compare the gear shift stroke or test drive to know.
Six liters: TFT meter optimization.
At present, most domestic models are equipped with TFT fully fitted screens, and the spring wind has also kept up with this wave of rhythm. TFT LCD screen is mainly divided into two kinds of lamination technology, one is the screen frame sticker, the other is the screen full fit, which is roughly the difference between the two mobile phone screens shown in the following figure.
Left: Nokia E71 (screen frame sticker), right: iPhone6 (screen full fit)
To put it simply, compared with the old screen, the advantages of the full-stick screen are three:
1. Improve the interlayer gap of the fit, reduce the air dust entry, and the screen is easier to keep clean.
2. Eliminate the air between the screens, reduce the loss of light reflection and light transmission, improve the brightness, and make the picture more transparent.
3, thinner than the traditional screen (of course, this is not very important on motorcycles).
From the actual experience, the change of the instrument of Chunfeng can be simply divided into two improvements:
The first is the brightness increase, the visible effect of the instrument under strong light will be much better, and the situation that the meter cannot be seen clearly can avoid the occurrence of sunlight.
The second is the addition of navigation functions, if easy to use, there is no need to install a mobile phone holder later.
Seven liters: T-BOX intelligent improvement.
Chunfeng's car has already come with its own T-BOX, and MY22 has been updated - built-in 4G +6D sensor.
The benefits of 4G are well understood, that is, faster and more real-time than 2G and 3G network transmission and response speed, saying that the information will not be too catonous, and the progress bar will not be rotated all the time is not to give any actual reaction. The 6D sensor provides high-precision measurements, with 6D parameters including three angles of rotation (pitch, roll, yaw) and three displacements X, Y, Z. Compared with a single coordinate, 6D data can grasp vehicle information more accurately, and with 4G modules, it can achieve more accurate positioning.
At the same time, this thing can also help everyone check their own pressure bending angle to see how many degrees of minimum pressure is not necessarily useful, but it can be more convenient for everyone to discuss and communicate with each other afterwards.
Eight liters: fixed wind wing and single swing arm.
Let's start with the wind wing.
MOTOGP's racing cars and flagship models of foreign brands are equipped with fixed wind wings, such as the Ducati V4S, BMW M1000RR and so on.
Since the debut of fairings with aerodynamic (wind control wing components) in 2015, many different designs and concepts have emerged, including the wind control wings mounted on top of the fairing and various high downforce designs. It was originally designed to improve vehicle stability and increase the downforce on the front of the vehicle to prevent the vehicle from cocking.
Gradually, the wind-setting wing seemed to become an iconic air kit for sports cars.
On the other hand, on the 250 class, is the wind wing really necessary? Can it really play its part?
The answer is no, in fact, whether it is a car or a motorcycle, the air kit will produce a corresponding performance blessing under certain working conditions, and the premise is that the vehicle can achieve this working condition. GP racing cars and foreign lift cars due to power, torque, grumpy, it is very necessary to add wind wings, and the domestic 250 level of imitation can do the speed and speed, we all have a rough number in mind.
But for entry-level models, this thing can play another crucial role, that is, to enhance the appearance.
The reason is not much to say, look at the new R15 fake stamping intake bar, this year handsome is the hard truth.
Let's talk about the single rocker arm that is specially equipped this time.
Single rockers also originated in motorcycle racing, initially purely to save time and change tires faster for cars.
Only from the perspective of mechanical structure, the symmetrical design of the double rocker arm is more stable. If a single rocker arm is used, the rocker arm material and structural rigidity are required more. So in theory, a single rocker arm in a civilian mass production car may not be lighter than a double rocker arm, but the manufacturing cost will certainly be higher than the double rocker arm.
However, if the single rocker arm is done well enough, its advantages are also self-evident, such as the lack of removal of the rear tooth disc and brake caliper when changing the rear tire, the narrowing of the distance between the exhaust tail section and the tire to bring the overall center of gravity closer to the vehicle axis, the handling experience is better, and the least important to me, but the most important word for the appearance party - handsome.
Therefore, single rocker arm and double rocker arm have their own advantages and disadvantages, I can not say that the single swingarm of MY22 is not good, it is just to cater to the taste of young Motorists and launched, will bring what kind of driving control feeling, we wait until we can touch the real car to try to know.
Nine liters: the sense of paint water quality is improved.
The performance of paint water is inseparable from the quality of paint and the spraying process, in this regard, I believe that as long as the spring wind wants, it can definitely be done, so for the time being, do not evaluate, the real car out to see the difference.
One drop: the whole car loses weight.
The official weight of the curb was reduced by 8 kg, and the actual weight loss was 7.6 kg (perhaps the regulations stipulate that the whole number is marked). For the new and old models, the reduction of the quality of the maintenance and the improvement of horsepower alone are of little significance, and I calculated the thrust-to-weight ratio and can see the key point.
In short, after nine liters and one drop, the Chunfeng 250SR MY-22 version has greatly improved its own quality, and it is said that Chunfeng has sent this car to the drivers of its own MOTO3 team for test driving experience, which has received high praise.
At present, the pressure has come to Zongshen Apulia and QJmotor here..., the current spring wind and wuji are in the appearance, performance and lightweight have made a great improvement, the performance of the domestic 250cc imitation competition in 2022 will be more cruel, only the appearance or only low price is definitely not feasible.
summary:
Since the launch of 150nk in 2014 and then the debut of 250nk at the Wanchi Circuit in 2018, Chunfeng has achieved a leap in the fun attributes of small-displacement motorcycles from the engine.
From the 250SR in 2020 to the 250SR MY-22 in 2022, Chunfeng has greatly improved the overall configuration of the play model (shape + power + lightweight), it can be said that from the ugly duckling to the white swan, it began to gradually equal international manufacturers, which must be a good thing for the domestic motorcycle circle.
It's just that I'm still curious about the content of the silence in the live broadcast room, what is the motorcycle + technology configuration? We estimate that we can only wait for the Chongqing Mozhan exhibition later to see if the spring breeze will show muscles again, right?