For a newly purchased ATV, what users need most is how to judge whether its technical state is good? What is its identification standard? In order to facilitate the majority of users to correctly identify and judge when purchasing ATVs, a brief introduction is now made for reference.
1. Starting performance. After the newly purchased ATV is filled with gasoline and oil (referring to two-stroke vehicles, separate lubrication type) and all starting preparations are ready, the starting method is correct. A good performance ATV should be able to operate at -10℃～+30℃ Start running at the ambient temperature, and the starting time is not more than 15 seconds. Otherwise, the starting performance is poor.
2. Running performance. After the engine is started, preheat for 3 to 5 minutes (the specific preheating time depends on the local ambient temperature: generally a little longer in winter and a little shorter in summer). The engine should run smoothly at idle speed, its speed should not be high or low, and the sound is soft and there is no obvious noise, which means that the engine idle speed is normal. At this time, you should listen to the meshing sound of the crankcase (ie the gear box) and the transmission parts. The response is slight, there is no noise, and the power transmission is correct and reliable. The operation should be smooth, without abnormal noise, its power performance and acceleration performance are good, the fuel combustion is normal, and the engine is not overheated. After parking, it should not be too hot to touch the right cover of the crankcase. Hold the thermometer to measure the oil temperature should be below 85 ℃. After restarting, the engine should run smoothly at idle speed, allowing only the monotonous sound of a combustion explosion of the mixture. Release the accelerator handle after rushing to the accelerator, and the engine must not be turned off.
3. Acceleration performance. When the vehicle is in good condition, the ATV should start acceleration and overtake acceleration on a flat road, passing 200 miles/hour should be less than 13 seconds), which means the ATV has a good acceleration performance. If there is a pause or slow growth rate when the crankshaft speed increases, it means that the acceleration performance of the engine is poor. You can also ride an ATV for a road test. When the accelerator is slammed, the speed of the vehicle can increase sharply, and the driver has a clear feeling of leaning back when sitting on the vehicle, which means that the engine has excellent acceleration performance and normal engine power. If the speed of the vehicle can only be increased slowly after the accelerator is increased, or even after a few hundred meters of driving, the acceleration performance of the engine can be judged to be poor.
4. The braking performance of the ATV. ATVs are sporty products, and their safety performance is the first in the driving performance of ATVs, and riders should treat them with caution. When purchasing a vehicle, a real vehicle test can be carried out to confirm. First, choose a dry and flat asphalt road or concrete road without longitudinal and lateral slopes, and the light ATV (that is, the total engine displacement of Drive at a speed of 30 kilometers per hour. After the speed of the ATV is basically stable, use the front and rear braking devices at the same time to stop the ATV from running. The braking distance of the light ATV should not exceed 4 meters, the ATV should not exceed 7 meters, and the tires of the vehicle have obvious drag marks on the road, indicating that the braking performance of the vehicle is good. It must be pointed out that when testing the braking performance of the ATV, it is also necessary to check the straightness of the front and rear wheels of the ATV respectively (that is, the front and rear wheels should be in a straight line). The front and rear wheels of the ATV can be placed on the ground. When the vehicle is straightened, another person is about 3 meters in front of the ATV to visually check whether the front and rear wheels of the vehicle are offset. The safest way is to brake test to verify. At the moment when the ATV brakes at the speed of the above test braking device, if the rear wheel of the vehicle is obviously shaken after the braking device works, it can be determined that the front and rear wheels of the ATV are offset. Since the straightness of the front and rear wheels of the vehicle is related to the safety performance of the ATV, it must not be ignored when purchasing.
5. The shock absorption effect of the ATV. In order to alleviate and attenuate the impact and vibration of the ATV due to the uneven road during the driving process, ensure the smoothness and comfort of the driving, and help improve the service life of the ATV and the stability of the operation, the ATVs are equipped with Shock absorber device. When purchasing, the driver can ride on the ATV and deliberately choose to drive on uneven roads. If a severe vibration is felt, it means that the shock absorption performance of the ATV is poor; if the driver only feels slight ups and downs without obvious vibration, it means that the ATV has a good shock absorption effect.
When purchasing an ATV, you should also pay attention to check whether the vehicle's operating mechanism is flexible, whether the sound and light equipment on the vehicle is in good condition, whether the control of each electrical switch is sensitive, and whether the circuit and oil circuit are unobstructed. Check the appearance of the vehicle, mainly to see whether the paint parts are bright and uniform, whether there are spots and other defects on the surface of the electroplated parts, and whether all the fasteners of the ATV are firm, etc.
