How to Change the Oil in a 2024 KTM 85SX

Shop parts for a 2024 KTM 85SX Dirt Bike.

Changing the gear oil in your 2024 KTM 85SX is crucial to maintaining optimal engine performance and ensuring the longevity of your dirt bike. Follow these step-by-step instructions developed exclusively for MotoSport.com to perform a safe and thorough oil change. This guide includes essential tools, precise steps, and specific tips for the 2024 model.

Tools and Supplies Needed

  • 10mm socket or wrench (for drain plug)
  • T-handle or ratchet
  • Torque wrench (for precise torque settings)
  • Oil catch pan
  • Funnel
  • Replacement gear oil (use high-quality, manufacturer-recommended oil)
  • New crush washer for drain plug
  • Clean rags for wiping spills
  • Gloves for protection

Recommended Oil Specifications and Capacity

  • Oil type: Use the gear oil recommended by KTM for the 85SX
  • Oil capacity: 500 ml (0.5 litres) of gear oil for the 2024 KTM 85SX

Steps to Change the Oil on a 2024 KTM 85SX

  1. Warm Up the Engine
    • Let the bike idle for a few minutes to warm the oil. Warm oil drains more completely.
  2. Stabilize the Bike
    • Place the bike upright on a stand. This ensures all oil drains and makes the job easier.
  3. Remove the Filler and Drain Plugs
    • Locate the gear oil filler cap on the right side of the engine casing and the drain bolt underneath.
    • Unscrew the filler cap to help the oil drain smoothly.
    • Using the correct tool (usually a 10mm socket), loosen and remove the drain plug. Be cautious as oil may be hot.
    • Let the oil drain fully into the oil pan. Tilt the bike gently if needed to ensure thorough drainage.
  4. Inspect and Clean the Drain Plug
    • Clean any debris from the magnetic drain plug—some metallic particles are normal, but excessive debris could indicate issues.
    • Replace the old crush washer with a new one to prevent leaks.
  5. Reinstall the Drain Plug
    • Thread the plug in by hand to avoid cross-threading.
    • Use the torque wrench to tighten the plug to 20 Nm (14.8 ft-lb) for the KTM 85SX.
  6. Refill with Fresh Oil
    • Place the funnel in the filler opening.
    • Pour exactly 500 ml (0.5 litres) of high-quality gear oil into the engine.
    • Double-check the amount; overfilling can cause leaking, while underfilling risks insufficient lubrication.
  7. Check Oil Level
    • With the bike upright, remove the oil level check screw on the side of the engine.
    • Oil should be level with the bottom of the check hole. If excess leaks out, let it drain until it stops.
    • If no oil comes out, add oil until the correct level is reached.
  8. Reinstall the Filler and Check Screws
    • Secure both screws, tightening them properly (do not overtighten).
  9. Clean Up and Final Check
    • Wipe away any oil residue from the engine and frame.
    • Start the bike, let it idle briefly, and check for leaks from both drain and fill plugs.

2024 KTM 85SX-Specific Callouts

  • Oil Capacity: 500 ml (0.5 litres) is the correct fill amount for the 2024 KTM 85SX. Do not exceed this amount to avoid pressure issues or leaking seals.
  • Shared Procedure: The 85SX shares its gearbox design with its Husqvarna and GASGAS counterparts, so these steps and capacity apply to those bikes as well.
  • Oil Level Check: The oil check screw is an essential feature—always verify the oil level after refilling, as improper level can harm transmission lifespan and shift performance.
  • Run and Double-Check: Running the bike for a minute and rechecking both oil level and for leaks is especially important on new or recently serviced KTM 85SX bikes.
  • Routine: KTM recommends changing the oil regularly, particularly after heavy riding or race events, to protect internal components and maximize engine longevity.

Pro Tips for Easy, Clean Oil Changes

  • Always use a new crush washer to prevent leaks at the drain bolt.
  • A funnel with a flexible spout or a dedicated motorcycle oil bottle helps avoid spills.
  • Warm up the bike before draining–cold oil clings to engine parts and doesn't drain completely.
  • Keep a record of each oil change–date, oil brand/type, and engine hours.

Care and Maintenance Reminders

  • Inspect the drained oil for metallic particles–some is normal, but high amounts could indicate internal wear.
  • Monitor gearbox performance–rough shifting or noise could be a sign of oil issues or other maintenance requirements.
  • Dispose of used oil safely at a recycling facility.

Follow these steps for every oil change, and your 2024 KTM 85SX will reward you with reliable, smooth performance lap after lap, ride after ride.

Related Shopping Categories

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Shop Oil Fillers and Drain Plugs for a 2024 KTM 85SX Dirt Bike.

Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.