Name: Honda TRX680FA, TRX680FGA Service Manual — Wiring Diagrams
Author: Honda

Only Honda's own shop data settles how the automatic transmission on this ATV comes apart, and this 565-page Honda TRX680FA, TRX680FGA service manual PDF puts that data in one file for both variants. The drive train chapter, one of the largest in the book, walks through shift valve body service and torque converter removal, while the lubrication system diagram traces oil from the pump through the cooler. Wiring diagrams for both models sit at the back beside symptom charts that run hard starting, low power, and rough idle down to a cause. Refill with 2.9 liters (3.1 US qt) after a drain and filter change, and torque the upper and lower engine hanger fasteners to 54 N·m (40 lbf·ft) when the engine goes back in. One wrong guess inside a torque converter buys you a second teardown. Bookmarked chapters and a searchable text layer take you straight to the brake caliper or starter relay you are working on.

What's Inside This Manual

System	Pages	Key Topics
General Information	3-42	Service Rules, Model Identification, General Specifications
Technical Features	43-56	PCM Powertrain Control Module, Pgm-Fi System, Automatic Transmission System
Frame/Body Panels/Exhaust System	57-77	Body Panel Locations, Front Carrier, Exhaust System
Maintenance	78-101	Maintenance Schedule, Air Cleaner, Steering System
Lubrication System	102-114	Lubrication System Diagram, Oil Pump, Oil Cooler
Fuel System	115-171	Pgm-Fi System Location, Fuel Line Inspection, Sub Fuel Tank/Fuel Pump
Cooling System	172-187	System Testing, Radiator/Cooling Fan, Water Pump
Engine Removal/Installation	188-200	Engine Removal, Engine Installation
Cylinder Head/Valve/Camshaft	201-224	Cylinder Head Removal, Cylinder Head Inspection, Camshaft
Cylinder/Piston	225-234	Cylinder/Piston Removal, Cylinder/Piston Inspection, Cylinder/Piston Installation
Alternator/Starter Clutch	235-250	Recoil Starter, Alternator Stator/Starter Reduction Gears, Flywheel/Starter Clutch
Sub-Transmission/Gearshift Linkage	251-266	Sub-Transmission, Gear Selector Lever Linkage, Selector Cable Adjustment
Crankcase/Crankshaft/Balancer	267-280	Crankcase Separation, Crankshaft, Crankcase Bearing Replacement
Drive Train System	281-354	Drivetrain System Location, Shift Valve Body, Torque Converter Removal
Front Wheel/Suspension/Steering	355-388	Front Wheel, Wheel Hub and Knuckle, Steering Shaft
Rear Wheel/Suspension	389-405	Rear Wheel, Rear Shock Absorber/Suspension Arm
Brake System	406-442	Brake Fluid Replacement/Air Bleeding, Front Master Cylinder, Rear Brake Caliper
Front Driving Mechanism	443-474	Front Drive Shaft, Differential Removal, Differential Disassembly/Inspection
Rear Driving Mechanism	475-503	Rear Drive Shaft, Final Drive Removal, Final Drive Installation
Battery/Charging System	504-512	Battery, Charging System Inspection, Alternator Charging Coil
Ignition System	513-520	Ignition System Inspection, Ignition Coil, Ignition Timing
Electric Starter	521-534	Starter Motor, Starter Relay Switch, Diode
Lights/Meters/Switches	535-554	Headlight, Ignition Switch, Fuel Gauge/Fuel Level Sensor
Wiring Diagram	555-556	TRX680FA/Fga
Troubleshooting	557-562	Engine Does Not Start or Is Hard to Start, Engine Lacks Power, Poor Performance at Low and Idle Speed

Quick Reference Specifications

Specification	Value	Page
Spark plug	22 N·m (2.2 kgf·m, 16 lbf·ft)	p. 79
Lower engine hanger nut (left and right) torque	54 N·m (5.5 kgf·m, 40 lbf·ft)	p. 190
Upper engine hanger bolt torque	54 N·m (5.5 kgf·m, 40 lbf·ft)	p. 190
Engine oil capacity (after draining)	2.7 liters (2.9 US qt, 2.4 Imp qt)	p. 9
Engine oil capacity (after draining/filter change)	2.9 liters (3.1 US qt, 2.6 Imp qt)	p. 9
Engine oil capacity (after disassembly)	4.1 liters	p. 9
Tie-rod ball joint nut torque	54 N·m (5.5 kgf·m, 40 lbf·ft)	p. 357
Tie-rod lock nut	54 N·m (5.5 kgf·m, 40 lbf·ft)	p. 79
Reverse idle gear collar I.D.	13.000 - 13.034 mm (0.5118 - 0.5131 in)	p. 11
Reverse idle gear shaft O.D.	12.966 - 12.984 mm (0.5105 - 0.5112 in)	p. 11
Idle speed	1,400 ± 50 rpm	p. 9
Spark plug gap	1.0 - 1.1 mm	p. 13

Brand	Honda
Model	TRX680FA, TRX680FGA
Machine Type	Atv
Manual Type	Service Manual
Language	English
Format	Searchable PDF (Digital Download)
Pages	565
File Size	42 MB
Wiring Diagrams	Yes
Hydraulic Schematics	Yes
Torque Specifications	Yes
Bookmarked / Indexed	Yes

Honda TRX680FA, TRX680FGA Service Manual — Wiring Diagrams

What's Inside This Manual

Quick Reference Specifications

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