Honda TRX450 FourTrax Foreman S/ES/FM/FE service schedule

1. Change the oil warm, with the quad on level ground.
2. Rear: remove the filler cap and drain plug, let it drain, refit the drain plug at 12 N·m, fill with 90 ml, then remove the level check bolt and make sure oil reaches the check hole.
3. Front: remove the filler cap and drain plug, let it drain, refit the drain plug at 12 N·m and fill with 240 ml to the lower edge of the filler inspection hole.
4. Refit the caps and bolts and check for leaks.

Tools: Drain tray, Socket set, Torque wrench (12 N·m), Oil pump or squeeze bottle

1. Park on level ground, warm the engine briefly, stop it and take the key out. Take care: oil and exhaust are hot.
2. Remove the filler cap/dipstick, put the tray under the engine and remove the drain plug.
3. Undo the bolts and take off the oil filter cover on the right side. Let the last oil drain and throw the old filter away.
4. Check the cover O-rings. Put the spring back on the crankcase and fit the new filter with its rubber seal facing out, away from the engine. It is marked OUTSIDE (TOWARDS FILTER COVER).
5. Refit the cover and tighten the bolts to 10 N·m.
6. Refit the drain plug with a good washer at 25 N·m.
7. Fill with about 2.1 L of 10W-40 JASO MA oil and refit the dipstick.
8. Idle for 3–5 minutes, stop, wait 2–3 minutes and check the level is between the marks. Check for leaks.

Tools: Drain tray (4 L), Socket set, Torque wrench (10–25 N·m), Funnel, Shop towels, Gloves

1. Remove the seat and the air cleaner housing cover, and lift out the air cleaner.
2. Take the foam off its frame and wash it gently in non-flammable solvent, never petrol. Squeeze, do not twist.
3. Replace it if torn. Let it dry, oil it in a plastic bag and squeeze out the excess.
4. Refit it, the cover and the seat.

Tools: Screwdriver, Bowl of high-flash-point solvent (such as paraffin), Plastic bag, Gloves

1. With the engine off, look at the drain tube under the air cleaner housing.
2. If you can see deposits, remove the clip and tube, drain it and refit it.

Tools: Pliers for the clip

1. Let the engine cool and clean round the plug.
2. Remove the plug, check the electrodes and replace it if fouled, worn or cracked.
3. Set the gap to 0.8–0.9 mm, screw it in by hand and tighten as the handbook says.

Tools: Plug spanner (in the tool kit), Wire-type feeler gauge, Wire brush

1. Only check with the engine cold.
2. Follow the Honda service manual to set the piston at top dead centre on the compression stroke.
3. Check the gap is 0.15 mm, adjust if needed and recheck.

Tools: Feeler gauges, Spanners and adjusting tool, Service manual

1. Make sure the ignition is off.
2. Loosen the lock nut on the clutch adjuster at the front of the engine.
3. Turn the adjuster anticlockwise until you feel slight resistance, then turn it 1/4 turn clockwise.
4. Hold it and tighten the lock nut. Test ride. If it will not adjust or slips, the plates may be worn: see your dealer.

Tools: Spanner for the lock nut, Flat screwdriver

1. Let the exhaust cool fully.
2. Clean the spark arrester as the handbook shows and refit everything securely.

Tools: Spanners, Gloves

1. Check the brake fluid level and look for leaks.
2. Check shoe wear as the handbook shows and have worn shoes replaced by your dealer.
3. Check the brakes work properly and the lever and pedal free play is right.

Tools: Torch, Steel rule