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(1) Drain the oil when disassembling the engine.
(2) Dust and mud must not enter the motor.
(3) Drain the oil when it is warm.
(4) When installing the spark plug, tighten it first with your fingers and then with the spark plug wrench.
(5) Valve lash inspection should be done cold (cylinder temperature is less than 35 degrees).
(6) When adjusting the chain, the scales of the signs on both sides should be consistent.
(7) When the chain is installed, the opening direction of the chain clip should be opposite to the moving direction of the chain.
(8) When recharging the battery, distilled water should be added.
(9) Tire pressure should be checked cold.
(10) The substitution of various cables must not interfere with the rotation of the handlebar.
(11) During the spark plug flashover test, be careful not to leak gasoline or get too close to the fuel tank.
(12) The fuel tank switch locknut cannot be over-tightened.
(13) When adjusting the idle speed, the idle speed setting screw does not rotate for one minute, so as not to damage the nail seat.
(14) When removing and installing the valve lock clip, do not over compress the valve spring.
(15) When using a reamer, apply cutting oil.
(16) Generally, the valve should not be placed on the ground.
(17) When servicing the valve, you should pay attention not only to the tightness, but also to the position and width of the contact.
(18) The outside diameter of the detection piston is generally measured 10mm from the bottom of the piston.
(19) When the piston ring is installed, the upper ring and the second ring cannot be reversed.
(20) When installing the piston ring, do not scratch the piston.
(21) When the engine is assembled, each oil hole cannot be blocked.
(22) Remove piston pin once and try to use a new piston pin retaining ring.
(23) Piston pin retaining ring should not line up with piston bore.
(24) When the bearing is installed, the sealing end should generally face out.
(25) When the brake is repaired, it should not be smeared with grease.
(26) When the wheel is installed, the projection on the odometer must be aligned with the slot in the wheel hub.
(27) When installing the standpipe nut, first adjust the nut to tighten to the end, and then reposition it at 45 degrees, which can generally make the clearance appropriate.
(28) The bearing should not tilt when pressed.
(29) The battery temperature cannot exceed 45 degrees when charging.
(30) When charging the battery, pay attention to ventilation to prevent sparks and open flames.
(31) After disassembly and assembly, the seals and cotter pins usually need to be replaced.
(32) After disassembling and inspecting the engine and transmission parts, apply lubricating oil on the surface to prevent rust.
(33) Tighten nuts and bolts using criss-cross method to torque value required by installation instructions.
(34) When installing the components, pay attention to adding the corresponding lubricating grease.
(35) Use specialized and general tools.
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