The solutions for lost tram keys and no spare keys are as follows:

1. Go to the electric vehicle sales point or after-sales point and ask them for a key. They have the same model of car. There are many keys.

2. Find a locksmith to open the lock and then match it with a key. This will cost a little money, but it is inevitable.

3. Use tools to pry it open, then use the wiring to ignite, and then start the electric car. This requires some professional skills and should not be attempted lightly.

Notes

1. The screws and nuts fastening the bicycle should be tightened and must not loosen or fall off.

2. Each rotating part should operate flexibly and should not be stuck or stiff. For example: the front and rear wheels should rotate flexibly and should not swing left and right or jump up and down. When they are about to stop, the wheels should swing briskly back and forth and should not stop rotating suddenly. The handlebar should be able to rotate left and right flexibly, and the pedal shaft and crank should be tight, not loose from each other, and rotate flexibly.

3. The transmission vehicle should have correct gears within the transmission range, the transmission position should be clear, and there should be no gaps in the middle.

4. The chain should be appropriately tight and flexible in operation. Shake the crank sprocket repeatedly in forward and reverse directions by hand. The chain will run flexibly and there should be no chain skipping or falling off.

5. Hold the front and rear parts of the saddle with both hands, and push down the front end of the saddle with one hand. The front end of the saddle must not collapse. Then use both hands to turn the saddle horizontally, and the saddle should not turn.

6. Selection of brakes and braking systems: Hold the handlebars with both hands, brake left and right while pushing and pulling the bicycle forward and backward. The wheels should not rotate at this time; release the handle and the braking system should be able to reset quickly.

7. The surface of each component should be clean, free of stains and rust, and the trademark decals should be complete and clear, with no sharp edges, burrs, etc. For example, there should be no tingling feeling on the edges of mud plates and chain covers, brakes, etc. The ends of the steel ropes should be equipped with protective sheaths, etc.

8. Observe the grade or label of the parts. Generally speaking, good parts are marked with obvious trademark marks and the patterns are clear and beautiful, while inferior parts are rarely marked or are rough.

9. The switches in each part are sensitive and reliable.

10. Speed ??regulation is stable and reliable. Turn the speed control handle slowly and the motor should start and accelerate smoothly. After releasing the handle, the handle can be quickly reset and the motor will decelerate evenly.

11. The brake power off is quick and reliable. Turn the speed control handle, and after the motor is running and the brake is pressed, the motor can immediately cut off power. If there is a power display, you can see that the display returns to zero.

12. The battery is easy to disassemble and assemble. The weight of a lead-acid battery is generally about 13.5kg. Since it needs to be disassembled and assembled every day, the position of the battery must be suitable for your body shape.