1995–2000 Honda FourTrax TRX300 / TRX300FW Service Manual (P/N 61-010300)

• Covers 1995-2000 Honda FourTrax TRX300 (2WD) and TRX300FW (4WD) ATVs, with model-specific procedures and separate information for '95-'97 and after-'97 machines.
• Covers engine removal and installation, cylinder-head and valve-train repair, camshaft and cam-chain timing, valve-guide replacement, valve-seat inspection/refacing, and cylinder/piston service.
• Details fuel-system diagnosis and carburetor repair, including fuel tank and air-cleaner housing removal, carburetor disassembly/assembly, float-level inspection, pilot-screw adjustment, and high-altitude setup.
• Provides clutch, oil-pump, kick-starter, starter-clutch, gearshift, crankcase, crankshaft, balancer, and transmission removal, inspection, assembly, and adjustment coverage.
• Includes front and rear suspension, steering, brake, axle, and final-drive repair, with dedicated TRX300FW front drive-shaft, front differential, front gear-case, and side-shaft procedures.
• Supplies ignition, charging, starter, lighting, switch, and warning-system diagnosis, together with '95-'97 and after-'97 wiring diagrams, system diagrams, peak-voltage testing, and fault-finding charts.
• Provides component torque tables, fluid-capacity and transmission gear-ratio data, valve-clearance and wear limits, gear backlash and tooth-contact specifications, electrical test values, Honda special-tool numbers, routing drawings, and exploded assembly views.

This 353-page Honda factory service publication in PDF form is organized around the 281.7 cc air-cooled, four-stroke single-cylinder engine and the five-speed constant-mesh transmission with reverse. It separates the TRX300 and TRX300FW wherever the chassis or driveline layout changes. The 2WD model receives its own tie-rod, knuckle, and front-arm procedures, while the 4WD model adds front drive shafts, a front differential, front gear case, and front drive side shafts. Engine removal also identifies the extra front-drive components that must be handled on the TRX300FW.

Year breaks are treated as service differences rather than buried in a generic model range. Separate maintenance schedules are provided for '95-'97 and after-'97 units. The fuel and emissions information distinguishes the VE91C carburetor from the after-'97 California-type VE91D configuration, and the electrical section supplies separate wiring diagrams for '95-'97 and later machines. After-'97 California emission-control routing and labels are covered as well.

Engine and fuel-system repair

The fuel-system chapter goes beyond routine adjustment. It covers fuel-tank and air-cleaner housing removal, carburetor removal, starting-enrichment valve inspection, float and jet service, primer and vacuum-piston/diaphragm inspection, float-level checking, carburetor installation, pilot-screw adjustment, and high-altitude carburetor setup. Troubleshooting tables link hard starting, poor idle, hesitation, afterfiring, rich or lean operation, and poor fuel economy to specific fuel, ignition, and carburetor checks.

Engine repair sections document removal and installation, cylinder-head cover disassembly, rocker arms and shafts, camshaft and cam-chain tensioner service, cylinder-head removal, valve-guide replacement, valve-seat inspection and refacing, head assembly, timing installation, cylinder inspection, and piston/ring service. The related tables supply compression standards, valve and guide limits, camshaft and rocker-arm inspection data, cylinder taper and out-of-round limits, piston clearances, ring end gaps, and component-specific torque specifications.

Clutch, transmission, chassis, and final drive

The clutch chapter covers both the centrifugal clutch and change clutch, plus the primary drive gear, reverse-lock mechanism, oil pump, kick starter, and right crankcase cover. The next sections add starter-reduction gears, alternator and ignition-pulse-generator replacement, flywheel/starter-clutch service, gearshift linkage, crankcase separation, transmission disassembly, crankshaft/balancer work, output-gear service, and crankcase assembly.

Chassis coverage includes handlebar and throttle housing service, front wheels, model-specific tie-rod/knuckle and front-arm work, steering shaft, shock absorbers, brake-fluid replacement and air bleeding, master cylinder, front brake shoes and wheel cylinders, rear brake and pedal, rear wheels and tires, rear shock, and swingarm. Rear driveline repair covers the axle, drive shaft, and final-drive assembly. The TRX300FW chapter adds differential inspection, tooth-contact and backlash checks, front gear-case service, and front side-shaft removal and installation. A separate bodywork and exhaust section covers the front bumper, front and rear carriers, fenders, and muffler removal.

Electrical diagnosis, diagrams, and tools

Electrical sections address the ignition control module, ignition coil, pulse generator, alternator, ignition timing, peak-voltage testing, maintenance-free battery service, charging-system output, regulator/rectifier, starter motor, starter relay, diode, headlights, taillight, indicator lamps, neutral and reverse switches, oil-temperature sensor, and alarm unit. System diagrams and flowcharts support no-spark, charging, starting, lighting, engine-performance, and poor-handling diagnosis.

Useful visual references include the engine lubrication circuit; TRX300/TRX300FW cable and harness routing views; carburetor and cylinder-head exploded drawings; the clutch/oil-pump/kick-starter layout; front differential and final-drive assembly views; and year-specific wiring diagrams with electrical troubleshooting flowcharts. Honda tool references include the float-level gauge 07401-0010000, valve-spring compressor 07757-0010000, clutch holder 07GMB-HA70100, rotor puller 07933-3950000, and differential inspection tool 07KMK-HC5010A.

Manual-specific cautions matter on this platform. Installing the engine oil filter backward can cause severe engine damage. The centrifugal-clutch lock nut uses left-hand threads, so treating it as a conventional fastener can damage the crankshaft threads. Carburetor assembly also requires the vacuum diaphragm to sit correctly in its groove without being pinched, and the pilot screw must not be forced against its seat.

Working on ATVs involves significant mechanical forces and potential safety risks. Securely support the machine, isolate the ignition and battery where required, and work in a ventilated area away from fuel vapor and hot exhaust components. Use the manual's safety notices and appropriate shop experience before starting engine, brake, steering, or drivetrain repair.