① Support the motorcycle with the main ladder and jack (or wooden box).

② Remove the speedometer drive flexible shaft.

③ Remove the front brake wire rope and adjusting nut, and remove the brake wire rope.

④ Pull out the cotter pin and remove the front axle nut.

⑤ Pull out the front axle and remove the wheels, as shown in Figure 7- 18.

Figure 7- 18 Disassembly of front wheel assembly

⑥ Separate the front hub cover from the wheel, as shown in Figure 7- 19.

Figure 7- 19 Removing the front hub cover

⑦ Remove the oil seal and bearing.

(2) Disassembly of rear wheel assembly

The disassembly of the rear wheel assembly is shown in Figure 7-20, and the disassembly sequence is as follows.

Figure 7-20 Disassembly and Assembly of Rear Wheel Assembly

① Remove the upper and lower mounting bolts of the rear shock absorber and remove the rear shock absorber.

② Remove the bolts for installing the muffler, then remove two M6 nuts, and then remove the muffler assembly.

③ Remove the rear brake sheath, remove the rear brake adjusting nut, pin and spring, and then remove the rear brake control cable.

④ Remove the rear axle nut, rear wheel assembly and brake shoe assembly from the output shaft.

(3) Repairing tires with inner tubes

① The method of taking out the tire with inner tube is shown in Figure 7-2 1.

Fig. 7-2 1 method of taking out tire with inner tube

Step 1: Remove the wheel and lay it flat on the ground; Unscrew the valve nut and valve core, release the compressed air in the inner tube, then unscrew the valve fixing nut and press the valve gently. Step on the sidewall with the heel, so that the bead will separate from the rim and slide to the middle of the rim.

Step 2: Apply soapy water to the tire bead, and install a rim protector opposite the valve. Insert the tire pry bar into the outer tire and pry up the bead. Be careful not to insert the tire pry bar too deep during operation to avoid damaging the inner tube.

Step 3: After the first tire pry bar pries the tire bead, insert the second tire pry bar 30 ~ 50 mm away from the first tire pry bar to pry the tire bead, then pull out the first tire pry bar (keep the second tire pry bar) and insert it in another place to pry the tire bead. Lever off the bead from the rim bit by bit. When the bead is pried open 1/2, remove the rest of the bead by hand.

Step 4: Press the valve into the tire cavity, puncture the tire by hand, and take out the inner tube.

② Check the leaking part of the inner tube. Immerse the inner tube filled with air into the water tank, rotate the inner tube and check the air leakage position of the inner tube. If there is a continuous bubbling part, that is, the leaking part, it is necessary to mark the repair, and it can be repaired by fire baking, as shown in Figure 7-22.

③ Fire mending the inner tube. First, clean the leaking part of the inner tube with a cloth, and then file the periphery of the leaking part of the inner tube with a wooden file, and the filed surface area should be slightly larger than the surface area of the fire spot; Then, cover the filed inner tube with a fire sticker that peels off the protective layer, put a burning agent, press the fire sticker and the inner tube through the heating cover with a tire patch clamp, and ignite the burning agent in the heating cover, as shown in Figure 7-23. After the combustion-supporting agent is burnt out and naturally cooled for about 10 minute, loosen the tire patching clamp, and after it is completely cooled and installed without air leakage, the inner tube can be installed and used.

Figure 7-22 Check the air leakage position of the inner tube.

Figure 7-23 Fire-mended Inner Tube

④ Install the inner tube. The steps of installing the inner tube are shown in Figure 7-24.

Figure 7-24 Steps for Installing Inner Tube

Step 1: Apply soapy water to the tire bead, and install one side of the tire bead on the rim with a tire pry bar. Note that there is an arrow in the direction of rotation on the tire side, and make the arrow face the wheel direction.

Step 2: Align the valve on the inner tube with the valve hole on the rim and install it, and tighten the valve fixing nut.

Step 3: Put the inner tube into the inner ring of the outer tire step by step, and be careful not to twist the inner tube.

Step 4: Squeeze the other side of the bead into the middle of the rim by hand. When the tire cannot be squeezed by hand, pry the tire into the middle of the rim step by step with two crowbars at intervals of 30 ~ 40 mm each time.

Step 5: when you reach the final position, pry up two crowbars at the same time and put all the beads in. Then push the valve back to its original position, install the valve core, coat soapy water on the whole bead circumference, and then inflate the inner tube to about 1/3 of the standard air pressure. Tap the surface of the outer tire with a rubber hammer to stretch the inner tube until the rim line of the outer tire matches the circumference of the rim edge evenly.

Step 6: Inflate the inner tube to the standard air pressure and tighten the valve fixing nut and the valve nut.

(4) Repairing tubeless tires

The steps of repairing tubeless tires are shown in Figure 7-25.

Figure 7-25 Steps for Repairing Tubeless Tires

Step 1: shape the hole.

Step 2: Apply super glue to the plug.

Step 3: Insert the plug into the hole with a screwdriver.

Step 4: Remove the screwdriver from the plug.

Step 5: Cut off the extra plugs.

Step 6: Test the repair effect with soapy water.

Fig. 7-26 Repair without foreign matter entering the tire and with small cracks.

If there is a small tear in the tire and it can be confirmed that no foreign matter enters the tire, for example, if the tire is punctured by a nail and the nail has been completely removed, there is no need to remove the wheel, and you can try to repair the tire directly first. The specific method is: exhaust the gas, rotate the wheel to turn the crevasse to a horizontal position, first puncture the crevasse with a metal rod, then clamp the raw rubber strip on the notched awl, as shown in Figure 7-26, tighten the rubber strip, insert it into the crevasse, then slowly pull out the awl, cut the rubber strip flat with a knife, and then test the leakage with soapy water.

(5) Assembly of front wheel assembly

Reassemble and install the front wheel according to the reverse procedure of disassembly and disassembly, and pay attention to the following problems.

① Apply grease when installing the bearing.

② Install the bearing with special tools.

(3) Confirm whether the brake disc is clean and stained with grease.

(4) The brake disc bolts shall be torqued as required, and the washers shall be flanged.

⑤ Lubricate the speedometer gearbox before installing it.

(6) Assembly of rear wheel assembly

Assemble the rear wheel according to the reverse procedure of disassembly and disassembly.

(7) Emergency maintenance of rear wheel swing during driving.

Rear wheel swing is not common in motorcycle running, but its harm is far greater than front wheel swing. It is actually a lateral displacement phenomenon. The swing of motorcycle rear wheel will automatically change the driving direction, which is not easy to correct. It usually happens when turning at high speed. Because of the great danger of rear wheel swing, prevention is the main thing, mainly not to turn at high speed, the rear wheel pressure should not be too high, and the performance of the left and right shock absorbers should be consistent.

Once the rear wheel swings, you should immediately slow down by reducing the throttle. Do not brake too hard when turning at high speed. If the tire pressure is too high, put a little tire air after parking.