How to Change the Oil in a 2013 KTM 85SX – The Complete MotoSport.com Guide

Shop parts for a 2013 KTM 85SX Dirt Bike.

Keeping your 2013 KTM 85SX running strong means paying close attention to regular maintenance, especially oil changes. This detailed guide will walk you through the process, highlighting the tools required, step-by-step procedures, and model-specific tips that every owner should know to keep their bike in top condition.

Tools and Supplies Needed

  • Socket wrench set (with the correct size for your drain plug)
  • T-handle wrench (for easier access to hardware)
  • Torque wrench (capable of 20 Nm/14.8 ft-lb)
  • Oil catch pan
  • Funnel
  • Clean rag or paper towels
  • Replacement crush washer (recommended for the drain bolt)
  • Full synthetic gear oil (Motorex or Amsoil recommended, 0.5L – 0.8L capacity)
  • Pliers (for oil fill cap snugging)
  • Gloves (optional, but recommended for cleanliness)

Getting Started: Preparation

  • Warm up the engine for 2–3 minutes. This helps the oil drain more thoroughly.
  • Turn off the engine and place the bike upright on its stand for stability.
  • Gather your tools and supplies within easy reach.

Step-by-Step Oil Change Instructions

  • Remove the Oil Filler Cap
    • On the right side of the motor, locate and unscrew the oil filler cap to allow air flow and easier draining. Set it aside somewhere clean.
  • Drain the Old Oil
    • Position your oil catch pan beneath the drain bolt. On the 2013 KTM 85SX, this is under the brake lever area, near the lower right side of the engine.
    • Use your socket or T-handle wrench to remove the drain bolt.
    • Let the oil fully drain into the pan. Be cautious: if the engine is warm, the oil will be hot.
    • Remove and check the magnetic drain plug for any metal debris—small amounts are normal. Clean it thoroughly.
    • Replace the crush washer on the drain bolt to ensure a leak-proof seal.
  • Reinstall the Drain Bolt
    • Once the oil has drained completely, thread the drain bolt (with new washer) back in by hand.
    • Finish tightening with your torque wrench set to 20 Nm (14.8 ft-lb).
  • Fill with New Oil
    • Insert a funnel into the oil fill hole.
    • Pour in 0.5L–0.8L of full synthetic gear oil (Motorex or Amsoil is recommended; avoid conventional oils).
    • Model-Specific Note: While the general recommendation is 0.5L (500 ml), double-check the level with the check bolt on the right side case (just above the drain) for your exact model, as over- or under-filling can impact clutch performance.
  • Check the Oil Level
    • Locate the oil check bolt—on the 2013 KTM 85SX, it sits above the main drain bolt. Remove it; oil should just begin to dribble out or visibly sit at the bottom of the thread hole with the bike level.
    • If too much oil comes out, allow it to drain until it just reaches the correct level.
    • If no oil comes out, add oil in small increments until it does.
  • Reinstall the Filler Cap and Check for Leaks
    • Replace and hand-tighten the oil fill cap. KTM recommends giving it a slightly firm turn with pliers to prevent loosening during rides, but do not overtighten.
    • Start the engine and let it idle for a minute; visually check for leaks at the drain bolt and around the case.
    • After a test ride, recheck the area to make sure the seal holds and the oil level is correct.

Model-Specific Call-Outs for the 2013 KTM 85SX

  • Oil Recommendations: KTM strongly recommends full synthetic gear oil (preferably Motorex or Amsoil). Avoid cheap or non-synthetic oils to protect the transmission and clutch, as these perform best with high-quality lubricants.
  • Drain and Check Bolt Locations: Both bolts are located on the right side of the engine case. The check bolt is above the drain plug; ensure these are not cross-threaded when reinstalling.
  • Typical Capacity: Most 85SX models take 0.5L (or 500 ml), but always verify with the check bolt.
  • Torque Setting: Overtightening the drain bolt can damage the threads in the magnesium case. Always use a torque wrench set to 20 Nm (14.8 ft-lb).
  • Crush Washer Use: Always replace the drain bolt’s crush washer to avoid slow leaks after an oil change.

Frequently Asked Questions

  • How often should I change the oil? – For racing or heavy use, change every 5 hours of riding; for casual use, every 10–15 hours is sufficient.
  • Can I reuse the crush washer? – While it’s possible in emergent situations, using a new crush washer every time is highly recommended for a proper seal.
  • What if I overfill the oil? – Remove the check bolt and let excess oil drain until it reaches the correct level.

Performing your own oil changes not only saves money, but helps you get to know your 2013 KTM 85SX inside and out. For all your tools, oils, and parts needs, always shop MotoSport.com for the best OEM and aftermarket options.

Related Shopping Categories

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Shop Oil Fillers and Drain Plugs for a 2013 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.