The air filter element should be cleaned once after the running-in period, and the cleaning frequency should be increased when driving on dusty roads frequently. The steps are as follows:

1. Remove the right cover, the five fixing screws of the air cleaner housing, the air cleaner housing cover, and then take out the filter element.

2. Put the filter element into cleaning agent to clean and dry.

3. Spray dry the filter element with 15W/40QE engine oil, knead it evenly, and then squeeze out the excess engine oil.

4. Assemble in the reverse order of disassembly.

5. Pay attention to: 1 when installing the right cover, and replace the paper filter every 8000KM; 2. JH70 and JL90 are paper filter elements, which need compressed air to blow out dust.

Second, the maintenance and maintenance of the braking device

I. Adjustment of drum front brake

A support the main support and measure the free travel of the front brake lever from the free position to the start of braking, which is10 ~ 20 mm.

B, if it is not within the specified range, it should be adjusted, and the front brake nut should be adjusted clockwise to reduce the free stroke; Adjust the front brake nut counterclockwise to increase the free stroke.

C, hold the front brake handle several times, and then relax, check whether the front brake works well (turn the front wheel to see if the front wheel rotates flexibly).

D, it can also be adjusted by the front brake fine-tuning nut.

Note: If the pointer on the front brake is aligned with the scale on the brake end cover, the brake shoe should be replaced.

You should change your shoes every 4000 kilometers.

Clean and lubricate the clutch control line every 2000 km.

Second, the adjustment of the rear brake

First, support the motorcycle with the main bracket

B, the measured working stroke of the brake pedal from the original position to the start of the brake is 20 ~ 30 mm

C. If adjustment is needed, the adjustment method is the same as that of the front brake.

Third, battery maintenance

Remove the left cover.

The battery of a new car should be added with electrolyte between the upper and lower scales.

The new battery is charged and the use effect is better.

0. 1A current can be charged for 6 ~ 7 hours.

0.3A current can be charged for 3 ~ 4 hours.

Check the battery regularly. If the liquid level is lower than the minimum scale, add distilled water to the specified value. When the battery is dead or not used for a long time, it should be charged. Note: Hydrogen and oxygen will be generated during charging, and fireworks are strictly prohibited at the charging site.

Fourth, the running-in of motorcycles.

The running-in mileage of the new car is 1000KM, and it should be run-in according to the requirements of the instruction manual to prolong its service life. The specific method is as follows:

1, control speed

2, control the load, should control the load below 2/3 of the maximum load.

3, control the driving time, every 0.5 hours, should let the engine flameout cooling 10 minutes.

4. Change the oil frequently. It is recommended to change the oil every 300 kilometers during the running-in period.

Verb (abbreviation of verb) Inspection and adjustment of throttle control part

First, the throttle inspection and maintenance

Turn the throttle handle to check whether the return position is good. If it gets stuck or can't go back, it needs maintenance.

Step: 1. Remove the mirror.

2, remove the oiler seat, remove the throttle control line and oiler.

3. Add a little lubricating oil to the throttle control pipeline and a little lubricating grease to the oiler.

4. Reinstall in the reverse order. Pay attention to cleaning and lubricating the throttle line every 2000 kilometers.

Second, the adjustment of the free stroke of the throttle handle

The free stroke of the throttle handle is 2 ~ 6mm. If it does not meet the requirements, it should be adjusted.

The adjustment steps are as follows: loosen the lock nut, rotate the throttle adjusting solenoid valve to the specified position, then tighten the lock nut and rotate the throttle adjusting solenoid valve clockwise to reduce the free stroke of the throttle; Turn the throttle adjustment solenoid valve counterclockwise, and the free stroke of the throttle will increase.

Inspection, adjustment and lubrication of intransitive verb transmission chain

1. Inspection method: support the motorcycle with the main bracket, step on the speed change pedal and put it in neutral, and swing the chain up and down. Check that its swing should be10 ~ 20 mm. If it is not within this range, it should be adjusted.

2. Adjustment method

A loosen the lock nut of the rear axle and the adjusting nut of the rear brake.

B, loosen the lock nut of the chain regulator

C. Turn the adjusting bolt clockwise to reduce the swing of the chain, turn the adjusting bolt counterclockwise to increase the swing of the chain, and adjust the swing of the chain to10 ~ 20 mm..

Note: The scales of the left and right chain adjusters should be the same.

If the scale of the chain regulator is in the last grid after adjustment, it means that the chain transmission part is excessively worn, and the large and small sprockets and chains should be replaced.

D, check the tightness of the chain, first tighten the adjusting bolt of the chain regulator, and tighten the lock nut of the rear axle.

If the chain is found to be short of oil, it should be lubricated. Generally speaking, it should be cleaned and lubricated every 500 kilometers.

The steps are as follows:

1. Remove the shift arm.

2. Remove the left rear engine cover.

3. Remove the rear chain box.

4. Find the movable link, remove the movable lock clip with pliers, remove the chain from the rear direction, put the chain into the cleaning agent for cleaning, and then air dry. Check the wear of the chain and replace it if necessary.

Note: The opening direction for installing the movable link locking clip should be opposite to the chain movement direction.

5, according to the reverse order, add the right amount of lubricating oil on the chain.

Seven, oil inspection and replacement

Check the oil and oil level before driving every day.

1. Put the motorcycle on the flat ground and support it with the main support.

2. Loosen the dipstick to see if the oil level is between the upper and lower scales. If the amount of oil is too small, add the specified oil to change the lubricating oil and clean the filter.

1. Warm up the engine for 2-3 minutes, and then turn it off.

2. Put an oil tank under the engine.

3. Loosen the oil hole cover, remove the oil drain hole cover, and take out the oil filter and spring.

4. Press the recoil starter several times to drain all remaining oil.

5. Put the spring, filter screen and oil drain hole cover into cleaning agent for cleaning.

6. Check whether the O-ring seal and filter screen are in good condition, replace them if damaged, and then put them back in the reverse order of disassembly.

7. Inject new engine oil between the upper and lower scales. Note: the oil should be changed three times during the running-in period of new cars.

Eight. Inspection and replacement of spark plugs

1, remove the spark plug cap, and remove the surrounding sundries.

2. Remove the spark plug with the spark plug socket wrench provided with the vehicle.

3. Remove the carbon deposit on the spark plug with a soldering iron, and remove the sundries on the spark plug with a brush.

4, check whether the spark plug electrode ablation, if there is ablation, should replace the spark plug.

5. Check the spark plug gap with a thickness gauge and adjust the spark plug gap to 0.6-0.7mm.

6, check the gasket on the spark plug, if serious deformation or rupture, should be replaced.

7. Spark check: Start the engine with your feet and check the spark color, which should be blue and white.

8. When tightening the spark plug, in order to prevent thread disorder, the spark plug should be screwed in place by hand first, and then tightened with the spark plug sleeve.

Nine, vehicle storage

If the vehicle is not used for a long time, and the time exceeds 1 month, the following work should be done:

1, wash and dry the motorcycle, wax the body, and apply lubricating oil to the rust-prone parts.

2. Drain the fuel from the carburetor

3. Remove the spark plug and inject15 ~ 20ml lubricating oil into the cylinder.

4. Take out the battery and put it in a dry and ventilated place to avoid direct sunlight.

5. Inflate the tire to the specified air pressure and put it on the mat.

6. Cover the motorcycle with cloth or articles with strong ventilation, and park the pheasant motorcycle in a ventilated place with small temperature difference.