1985–1986 Kymco Xciting 500 Scooter Service Manual (PN 4121-LBA2-S00)

This Kymco factory service manual covers the XCITING 500 configuration documented in Kwang Yang Motor Co.'s First Edition, February 2005, carrying title-page code 4121-LBA2-S00. It is specific to the 498.5 cc liquid-cooled, single-cylinder four-stroke with a CVK carburetor (identification 15F8 SD8), electric fuel pump, CVT, automatic centrifugal clutch, and linked hydraulic brakes. The fuel chapter is carburetor-based; it does not cover electronic fuel injection. The set totals 349 PDF pages across 22 files: two pages of front matter plus Sections 1-21. Its engine teardown, brake-hydraulic, and electrical test content makes it suited to technicians and experienced DIY mechanics who have normal shop equipment and the specified pullers, holders, and measuring tools.

• Engine repair reaches from removal/installation and compression testing through camshaft, rocker-arm, valve, cylinder, piston, cam-chain, crankcase, crankshaft, and balancer service, with inspection limits and assembly data.

• Fuel-system procedures cover CVK carburetor removal and overhaul, float/jet/diaphragm inspection, auto-bystarter and carburetor-heater tests, and electric fuel-pump testing. Separate chapters handle the oil pump, relief valve, oil cooler, cooling-system pressure test and bleeding, thermostat, water pump, radiator, fan switch, and temperature sensor.

• The CVT and final-reduction chapters detail left-cover and drive-pulley removal, weight-roller and ramp-plate inspection, belt and clutch/driven-pulley service, driven-face bearing replacement, plus final-drive disassembly, gear and shaft inspection, bearing replacement, and assembly.

• Front and rear chassis procedures cover wheel removal, rim/axle/bearing inspection, wheel and rear-fork bearing replacement, fork and handlebar removal/installation, steering-stem bearing replacement and adjustment, and rear-shock inspection and replacement.

• Linked-brake repair includes separate front and combination-circuit fluid replacement and bleeding, front and rear master cylinders, the delay valve, front calipers, rear/parking caliper, disc inspection, pad replacement, and parking-brake linkage adjustment.

• Electrical fault isolation covers battery current leakage and charging output, alternator and regulator/rectifier checks, ignition-coil peak voltage, pulse-generator and starter-relay tests, and switch and sensor checks. Speed-sensor adjustment, fuel-unit testing, bank-angle and side-stand sensors, and the heater control unit are handled separately.

• Reference graphics include the lubrication-system diagram, cooling-system flow pattern, cable-and-harness routing views, drive-and-driven-pulley schematic drawing, charging-system circuit, and full vehicle wiring diagram with color codes and switch contact tables.

Factory Repair Depth

Routine service coverage follows the factory maintenance schedule. It addresses throttle and valve adjustments, engine and transmission lubrication, cooling, the secondary-air system, brake and parking-brake checks, headlight aim, side stand, suspension, wheels and tires, fasteners, and steering-head bearings.

A dedicated access chapter maps removal and installation of the seat, luggage box, windshield, body panels, lamp assemblies, meter, floorboard, fenders, and exhaust. The engine chapters distinguish in-frame service - oil pump, water pump, cylinder head and piston, CVT, final reduction, and alternator/starter clutch - from crankshaft and balancer repair, which requires engine removal and crankcase separation. The crankshaft section adds a select-fit table matching journal codes, crankcase bore codes, and main-bearing color codes for replacement selection.

Specifications are organized by assembly and include component-specific torque tables, lubricant and capacity data, clearances, wear and service limits, and electrical test values.

Special Tools, Diagnostics, and Scope

Named tool callouts include tappet adjuster E036, valve spring compressor E040, clutch spring compressor E053, flywheel puller E054 and holder E021, bearing puller E037, and oil-seal/bearing installer E014. Troubleshooting runs from hard starting and loss of power to CVT, no-spark, charging, starter, brake, steering, and suspension faults; the electrical sections then provide circuit-specific tests. The ignition-control module is factory preset, so the manual documents diagnosis rather than an ignition-timing adjustment.

The suspension scope is narrower than the engine and brake coverage: the fork section documents removal and installation, not an internal fork overhaul, and the rear shock is inspected and replaced as an assembly.

Manual-Specific Service Cautions

The manual warns against prying the crankcase halves apart because the sealing faces can be damaged. It also cautions against cleaning carburetor jets or passages with wire because this can damage the jets and passageways. Let the engine and radiator cool before opening the cooling system, and verify brake operation after hydraulic service.