Honda TRX300FW FourTrax 4x4 / TRX250 Recon service schedule

1. Stop the engine, take the key out and remove the seat to reach the air cleaner case.
2. Take out the screws and lift out the air cleaner assembly. Undo the clamp and bracket and slide the foam off its frame.
3. Wash the foam gently in non-flammable solvent such as paraffin, never petrol. Squeeze it out; do not twist it.
4. Replace it if it is torn. Let it dry fully, then work foam filter oil through it inside a plastic bag and squeeze out the excess.
5. Refit the foam, clamp and bracket, put the assembly back and refit the screws and seat.

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

1. With the engine off, find the drain tube under the air cleaner case.
2. If you can see water or dirt in it, remove the clip and pull the tube off.
3. Drain the deposits, refit the tube and secure it with the clip.

Tools: Pliers for the clip

1. Let the engine cool and clean dirt from round the plug before taking off the cap.
2. Unscrew the plug and look at the electrodes. Replace it if fouled, worn or cracked.
3. Set the gap to 0.8–0.9 mm by bending the side electrode only.
4. Screw it in by hand first, then tighten as the handbook says, and refit the cap.

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 take off the tappet covers and set the piston at top dead centre on the compression stroke.
3. Check the gaps: TRX300FW 0.15 mm; TRX250 Recon 0.13 mm inlet and exhaust.
4. Adjust if needed, recheck, and refit the covers. Otherwise have your dealer do it.

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

1. Make sure the ignition is off and the engine is cool.
2. Loosen the lock nut on the clutch adjuster on the right crankcase cover.
3. Turn the adjuster anticlockwise until you feel slight resistance, then turn it back 1/4 turn clockwise.
4. Hold it there and tighten the lock nut. Test ride to check the clutch works properly. If it will not adjust, the plates may be worn: see your dealer.

Tools: Spanner for the lock nut, Flat screwdriver

1. Let the exhaust cool fully.
2. Follow the handbook to clean out the spark arrester, and refit everything securely.
3. If you are unsure, have your dealer do it.

Tools: Spanners, Gloves

1. Change the oil warm, with the quad on level ground.
2. For each case, put the tray under it and remove the filler cap and drain plug.
3. When it has drained, refit the drain plug at 12 N·m.
4. Front gear case (TRX300FW): fill with 190 ml of 10W-40 engine oil, then take out the level check bolt and make sure oil reaches the level hole.
5. Rear final gear: fill with the stated amount until oil reaches the lower edge of the inspection hole (TRX250: until it reaches the level check hole).
6. Front differential (TRX300FW): fill with 190 ml until oil reaches the lower edge of the inspection hole.
7. Refit the filler caps and level 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, stop the engine and take the key out. Change the oil while the engine is warm, but take care: oil and exhaust are hot.
2. Take out the filler cap/dipstick on the right crankcase cover, put the tray under the engine and remove the drain plug.
3. TRX300FW: undo the bolts and take off the oil filter cover. Let the last oil run out and throw the old filter away.
4. Check the cover O-rings. Fit the new filter with its rubber seal facing out, away from the engine. It is marked OUTSIDE (TOWARDS FILTER COVER). Fitted the wrong way it can wreck the engine.
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 2.2 L (TRX300FW) or 1.5 L (TRX250) of the right oil and refit the dipstick.
8. Idle for a few minutes, stop, wait and check the level with the dipstick resting in, not screwed in. Top up to between the marks; do not overfill.
9. Take the old oil to a proper disposal point.

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

1. With the quad on level ground, pull out the inspection hole plug on each front brake drum.
2. Measure the lining thickness. If either lining is worn to 1.0 mm or less, have both shoes replaced by your dealer.
3. If the lever free play is too great but the linings are fine, adjust the brake lining clearance as the handbook shows.
4. Refit the inspection plugs so they seat fully. Check the rear brake and parking brake work properly.

Tools: Pliers or screwdriver for the inspection plugs, Steel rule