Introduction, Body cover and exhaust system, scheduled maintenance, lubricating system, fuel system, engine removal and installation, cylinder head valve, cylinder and piston, driving bel device & the starting lever, the final transmission assembly, the crankcase and the crankshaft, the front wheel, front brake, front buffer and the front fork. The rear wheel, the rear brake & rear shock, the battery and the charging system, ignition system, starter system, meters, switches and lighting system. speedometer Engine and frame number positions product specifications and techical data technical tips torque settings. techical tips : replace all gaskets, o-rings, circlips and cotter pins when performing maintenance on the scooter. Nuts and bolts on all engine covers should be tightened in a diagonal pattern to uniformly distribute clamp force. Special service tools may be required to perform maintenance and repairs on this scooter. Always use the proper tools to prevent damage to the scooter. When performing maintenance on the scooter, make sure that all moving parts and controls move freely and return to their proper position. When disconnecting the battery, always disconnect the negative terminal first.