KYMCO MXU 50 / MXU 50 REVERSE / MX'ER 50 — 2006 ATV Service Manual (P/N T100LB10DE)

This KYMCO ATV service manual covers the 2006 MXU 50 (LB10), MXU 50 Reverse (LB10), and MX'ER 50 (LA10). It is the January 2006 first edition from Kwang Yang Motor Co., Ltd. (P/N T100LB10DE).

Search, Bookmarks, and Diagram Detail

Text search and wiring labels: The manual text is searchable. Five bookmarks open major sections of the file. The wiring diagram headings are searchable, while the labels inside the four main diagrams are part of the images. Small labels need zooming, and some connector markings on the MXU 50 Reverse diagram remain hard to read at higher magnification.

The download is one printable English-language PDF with 245 pages, including the publisher’s opening page and the preface with the table of contents.

Engine, Drivetrain, Brake, and Electrical Service

These are selected workshop topics. The manual also covers body-panel fastener removal and exhaust muffler removal and installation.

• Engine repair: Engine removal and installation, in-frame cylinder head, cylinder, piston and ring service, crankcase separation, crankshaft inspection and replacement, and A.C. generator removal.
• Fuel and lubrication: PB carburetor and auto bystarter service, float and jet inspection, reed-valve checks, fuel tank and valve work, oil-pump inspection and synchronization, and oil-line bleeding.
• CVT and driveline: Kick starter, starter pinion, drive belt, pulley rollers, clutch and driven-pulley bearings, plus separate final-reduction and reverse transmission procedures.
• Chassis and brakes: Wheel hubs and bearings, front drum brakes, rear drum brake adjustment, rear hydraulic disc brake service, suspension, steering, and rear axle work.
• Electrical diagnosis: Model-specific harness routing, wiring diagrams, charging and ignition circuits, and troubleshooting charts for starting faults, oil-level indication, and fuel-gauge operation.
• Included chapters: The PDF ends at manual page 16-7, before the dedicated starting system, lights and switches, and on-road equipment chapters listed in the contents. Chapter 1 includes starter-motor troubleshooting.

The disassembly, measurement, and electrical testing procedures suit experienced technicians and advanced owners with pullers, bearing drivers, a clutch spring compressor, electrical testers, and hydraulic-brake equipment.

Top-End Inspection and Reverse Transmission

The cylinder head, cylinder, and piston can be serviced with the engine in the frame. Cylinder-to-piston clearance and ring end-gap limits help you determine which parts need replacement during a top-end inspection.

The MXU 50 Reverse has its own in-frame transmission teardown and inspection procedures for the shift cam, fork, clutch dog, and drive axle. Incorrect shift-shaft indexing or gear-change switch engagement can interfere with gear selection. In the lubrication system, incorrect oil-pump indexing or air trapped in the lines can starve the engine of oil and seize the piston.

The general tool table lists ten numbered tools, including flywheel puller A120E00001, crankcase puller A120E00026, clutch spring compressor A120E00034, and nut wrench A120F00010.

Scheduled Maintenance and Brake Service

The maintenance schedule covers fuel line and throttle checks, foam air cleaner and spark plug service, oil filter and pump control checks, compression testing, and gear oil and belt inspection. Adjustment procedures cover headlight aim, steering play, toe-in, tire pressure, and chain slack. Lubrication instructions identify cable and suspension service points.

The rear disc brake procedures cover fluid replacement and bleeding, pad and disc inspection, and master-cylinder and caliper disassembly, measurement, and seal service. Fuel-system work, running-engine tests, elevated-vehicle procedures, spring-loaded clutch service, and hydraulic-brake repair require proper ventilation, control of ignition sources, secure support, eye protection, and suitable shop equipment.

Wiring and Fault Diagnosis

The four main wiring diagrams cover the MX'ER 50 On Road and Off Road, the MXU 50 On Road, and the MXU 50 Reverse On Road. Component-location views and separate charging and ignition schematics help identify connectors before checking charging output, current leakage, generator coils, the regulator/rectifier, the ignition coil, the pulser, or CDI supply voltage.

Sample Carburetor, Cylinder Head, and Gear Oil Specifications

The PB carburetor float-level check specifies 8.6 mm with the carburetor slightly tilted and the float valve just touching the float arm. The cylinder head installation specifies 16 N·m for the head bolts with staged diagonal tightening.

The gear oil capacity after disassembly is 0.12 liter for the MXU 50 and MX'ER 50 final reduction and 0.3 liter for the MXU 50 Reverse transmission.