Need help?Do you have a question about the Honda TRX70 Fourtrax 1987 and is the answer not in the manual?
General| Brand | Honda |
|---|---|
| Model | TRX70 Fourtrax 1987 |
| Category | Offroad Vehicle |
| Language | English |
Safety precautions for operating and maintaining the Fourtrax, emphasizing ventilation and hazard awareness.
Guidelines for using genuine parts, metric tools, and proper assembly procedures for servicing.
Details on identifying the '86 and 'After '86' models using frame and engine serial numbers.
Technical specifications for dimensions, frame, engine, and carburetor of the Fourtrax.
Specified torque settings for engine and frame bolts, crucial for correct assembly and safety.
List of special and common tools required for maintenance and repair procedures.
Guidelines for properly routing cables and wire harnesses to prevent damage and ensure safety.
Information on EPA regulations regarding noise emissions and prohibited tampering with the system.
Diagram illustrating the flow of oil through the engine's lubrication system.
General service information and notes related to lubrication procedures.
Details on engine oil capacity and recommended oil types based on API classification.
Specified torque value for the oil drain plug.
Common lubrication-related issues like low oil level and contamination.
Procedure for checking the engine oil level using the dipstick.
Step-by-step guide for draining and refilling the engine oil, including torque specifications.
Instructions for cleaning the oil filter rotor and screen components.
Diagram indicating all critical lubrication points on the Fourtrax for regular maintenance.
General overview and notes for the maintenance section.
Technical data related to maintenance tasks like valve clearance, tire pressure, and chain length.
Specific torque values for various maintenance-related fasteners.
List of tools required for performing maintenance procedures.
Recommended maintenance intervals for various components based on operating conditions.
Procedure for inspecting fuel lines for deterioration, damage, or leakage.
Instructions for removing, cleaning, and reinstalling the fuel strainer screen.
Checks for smooth throttle operation and cable condition, including lubrication.
Procedure for cleaning and re-oiling the air cleaner element.
Inspection, gap measurement, and replacement guidelines for the spark plug.
Procedure for inspecting and adjusting valve clearance while the engine is cold.
Steps for inspecting and adjusting the carburetor idle speed on a warm engine.
Procedure for testing cylinder compression using a compression gauge.
Instructions for checking and adjusting drive chain slack and lubrication.
Inspection and replacement of the drive chain slider and tensioner roller.
Procedure for checking brake shoe wear using the indicator plate.
Inspection and adjustment of the front and rear brake levers and cables.
Specific checks and adjustments for the rear brake lever and pedal free play.
Procedure for adjusting the clutch system, including checking free play.
Instructions for cleaning the spark arrester to remove carbon deposits.
Check all chassis nuts and bolts for tightness and proper torque values.
Inspection of tires for damage and checking tire pressure when cold.
Inspection of steering shaft free play and handlebar rotation.
General service information and safety warnings for fuel system components.
Fuel tank capacity and carburetor identification details.
Specified torque for the intake pipe mounting bolt.
List of tools required for fuel system maintenance, specifically the float level gauge.
Common issues related to engine starting, idling, and performance due to fuel system problems.
Procedure for removing and installing the fuel tank.
Procedure for removing and installing the air cleaner case.
Step-by-step instructions for removing the carburetor from the engine.
Procedure for disassembling the throttle valve from the carburetor.
Detailed steps for disassembling the carburetor, including jets and float assembly.
Instructions for cleaning parts and reassembling the carburetor.
Procedure for measuring and adjusting the carburetor float level.
Steps for installing the carburetor and performing necessary adjustments.
Procedure for adjusting the pilot screw for proper idle speed and fuel mixture.
Carburetor adjustments required for riding at high altitudes.
General information regarding engine removal and installation for transmission/crankshaft service.
Engine oil capacity details for removal and installation.
Specified torque values for engine mounting bolts and brake pedal bolts.
Step-by-step instructions for removing the engine from the Fourtrax.
Procedure for installing the engine back into the Fourtrax chassis.
Overview of cylinder head, valve, camshaft, and rocker arm maintenance.
Technical measurements for cylinder head components like compression, clearances, and warpage.
Specified torque values for cylinder head and related fasteners.
List of tools required for cylinder head and valve servicing.
Common problems related to low/high compression, noise, and their causes.
Step-by-step instructions for removing the cylinder head assembly.
Procedure for disassembling the cylinder head, including rocker arms and camshaft.
Inspection guidelines for rocker arms, shafts, and camshafts.
Procedure for inspecting valve seats and refacing them for proper sealing.
Instructions for grinding valve seats using specific cutters to achieve proper width.
Detailed steps for assembling the cylinder head, including valves and springs.
Procedure for installing the cylinder head assembly onto the engine block.
General information on cylinder/piston maintenance and inspection.
Measurements for cylinder bore, piston dimensions, and clearances.
Specified torque values for cylinder mounting bolts.
Common issues like low compression, excessive smoke, and knocking noise.
Step-by-step instructions for removing the cylinder assembly.
Inspection of cylinder bore for wear, taper, and out-of-roundness.
Procedure for removing the piston from the cylinder.
Inspection of piston rings for end gap and ring-to-groove clearance.
Measurement of piston diameter and calculation of cylinder-to-piston clearance.
Procedure for installing the piston into the cylinder, ensuring correct orientation.
Steps for installing the cylinder assembly, including cam chain routing.
Overview of servicing the clutch, oil pump, and gearshift linkage.
Technical data for clutch spring length, disc thickness, and oil pump clearances.
Specified torque values for clutch and related fasteners.
List of tools required for clutch and linkage service.
Common issues with clutch slipping, disengagement, hard shifting, and gear jumps.
Procedure for removing the right crankcase cover.
Steps for removing the clutch lifter mechanism.
Procedure for removing the clutch assembly components.
Detailed steps for disassembling the clutch assembly.
Inspection of clutch spring length, disc thickness, rollers, and plates.
Procedure for removing the gearshift linkage components.
Steps for installing the gearshift linkage assembly.
Procedure for removing, inspecting, and installing the oil pump.
Steps for installing the oil pump cover and the oil pump assembly.
Detailed steps for assembling the clutch components.
Procedure for installing the primary driven gear and securing the clutch assembly.
Procedure for removing and installing the brake pedal pivot assembly.
Procedure for installing the right crankcase cover.
Overview of servicing the recoil starter, alternator, and cam chain tensioner.
Specifications for cam chain tensioner spring length.
Specified torque values for starter, flywheel, and cam chain tensioner bolts.
List of tools required for servicing the recoil starter and alternator.
Common issues with recoil starter operation and rope recoil.
Step-by-step instructions for removing the recoil starter.
Procedure for disassembling the recoil starter components.
Procedure for removing the alternator components.
Removal, inspection, and installation of the cam chain tensioner.
Steps for removing the cam chain tensioner.
Inspection of the cam chain tensioner spring and push rod.
Procedure for installing the cam chain tensioner and related parts.
Procedure for installing the alternator components.
Procedure for installing the left crankcase cover.
Procedure for installing the recoil starter assembly.
Steps for assembling the recoil starter mechanism.
Overview of transmission and crankshaft maintenance.
Notes on engine removal requirements and parts needed before crankcase separation.
Technical data for transmission gears, shafts, and crankshaft clearances.
List of tools required for transmission and crankshaft service.
Common issues with shifting, noise, and gear engagement.
Procedure for separating the crankcase halves.
Procedure for removing and inspecting the crankshaft.
Steps for removing the crankshaft and measuring its runout.
Inspection of the timing sprocket teeth for wear or damage.
Procedure for disassembling and inspecting the transmission components.
Steps for disassembling the transmission, including gears, forks, and drum.
Inspection of shift forks, gear teeth, and gearshift drum.
Procedure for replacing bearings in the transmission and crankshaft areas.
Instructions for assembling the transmission shafts, gears, and related parts.
Procedure for assembling the crankcase halves.
Overview of maintenance for the front wheel, brake, and steering systems.
Safety precautions and general notes for servicing these systems.
Technical data for front wheel, brake, and steering components.
Specified torque values for handlebars, wheels, and steering components.
List of tools required for front wheel, brake, and steering system service.
Common issues with steering, wheel wobble, and brake performance.
Procedure for removing and installing the handlebar.
Steps for removing handlebar levers, grips, and controls.
Procedure for installing the handlebar and its components.
Procedure for removing and installing the front wheel.
Steps for removing the front wheel from the axle.
Procedure for installing the front wheel onto the axle.
Procedure for tire removal, installation, and repair.
Instructions for tire removal using a universal bead breaker.
Procedure for tire removal using a tire bead breaker set.
Instructions for repairing tire punctures using a rubber plug.
Procedure for assembling the rim halves, tire, and installing the valve core.
Procedure for inspecting and servicing the front brake system.
Inspection of brake lining thickness and brake drum inner diameter.
Inspection of brake drum bearings for smooth rotation and tight fit.
Procedure for replacing brake drum bearings and related components.
Steps for removing the brake panel, shoes, springs, and cam.
Procedure for assembling the brake panel, including shoes, springs, and cam.
Procedure for servicing the steering system components.
Steps for removing the front wheels, brakes, kingpin, knuckle, and tie-rods.
Inspection of tie-rods and ball joint rubbers for damage or wear.
Inspection of the kingpin/knuckle for damage or cracks.
Inspection and measurement of kingpin bushings.
Procedure for removing the steering shaft and its associated parts.
Inspection of bushings for wear or damage and measurement of their inner diameter.
Inspection of the steering shaft for damage or cracks.
Procedure for replacing the steering shaft bearings.
Procedure for installing the steering shaft, bushing, and related components.
Overview of maintenance for the rear wheel, brake, and drive mechanism.
Technical data for rear wheel axle runout and brake lining thickness.
Specified torque values for rear wheel, axle, and brake pedal fasteners.
List of tools required for rear wheel, brake, and drive mechanism service.
Common issues like wobble, vibration, and poor brake performance.
Procedure for removing the rear wheel.
Reference to tire service procedures on separate pages.
Steps for removing the rear brake components.
Inspection of brake lining thickness and brake drum.
Procedure for disassembling the rear brake shoes and springs.
Procedure for removing and installing the rear brake pedal.
Steps for removing the rear brake pedal and related parts.
Procedure for installing the rear brake pedal and connecting the cable.
Procedure for removing and installing the drive mechanism components.
Steps for removing the rear wheel, brake, chain cover, and drive chain.
Inspection of the driven sprocket, damper rubbers, and rear axle runout.
Procedure for replacing bearings in the rear axle assembly.
Procedure for installing the rear axle, driven sprocket, and dust seals.
Procedure for installing the rear brake panel, cam, shoes, and adjusters.
Procedure for installing the rear wheel, axle nut, and tightening wheel bolts.
Procedure for removing and installing the front and rear fenders.
Steps for removing fender mounting bolts and the seat/rear fender assembly.
Procedure for installing the front and rear fenders.
Procedure for removing and installing the exhaust pipe assembly.
Steps for removing exhaust pipe joint cap nuts and protector.
Procedure for installing the exhaust pipe and muffler assembly.
Overview of ignition system components and basic checks.
Notes on ignition timing adjustment and color codes for wiring diagrams.
Spark plug gap, ignition timing, and coil resistance specifications.
List of tools required for ignition system testing and service.
Common issues with engine starting, running, and spark generation.
Procedure for removing, testing, and installing the ignition coil.
Steps for removing the ignition coil.
Testing ignition coil resistance for primary and secondary circuits.
Procedure for testing the ignition coil using a CDI tester.
Procedure for measuring resistance of the alternator exciter coil.
Procedure for removing and testing the CDI unit.
Testing CDI unit continuity across various terminals.
Procedure for testing the CDI unit with a CDI tester.
Procedure for inspecting the pulse generator's resistance.
Measuring pulse generator resistance between wires.
Procedure for checking ignition timing using a timing light.
Inspection and replacement of the ignition switch.
Checking continuity of the ignition switch contacts.
Procedure for replacing the ignition switch.
Procedure for checking continuity of the engine stop switch.
Procedure for checking the neutral switch continuity.
Wiring diagram for the '86 model, showing ignition and related systems.
Wiring diagram for the 'After '86' models, including ignition and related systems.
Diagnostic guide for engine starting issues, covering fuel, spark, and compression.
Diagnostic guide for engine power loss, covering wheels, clutch, ignition, and carburetor.
Diagnostic guide for poor low-speed and idle performance.
Diagnostic guide for poor performance at high speeds.
Diagnostic guide for handling issues like heavy steering or wheel wobble.
Index entry for valve clearance information.
Index entry for valve guide replacement procedures.
Index entry for valve seat inspection and refacing.
Index entry for wheels and tires maintenance.
Index entry for wiring diagram references.
To Next Page