How to Change the Oil in a 2023 KTM 350 EXC-F: Step-by-Step MotoSport.com Guide

Shop parts for a 2023 KTM 350EXCF Dirt Bike.

Regular oil changes are crucial for the health and longevity of your 2023 KTM 350 EXC-F. Below, you'll find a comprehensive, proprietary guide for MotoSport.com customers, outlining every step, the tools you need, and expert call-outs specific to this make and model.

Tools & Supplies Needed

  • 13mm socket and socket wrench
  • 8mm socket (may be required for some covers)
  • 13mm wrench (backup for tight spaces)
  • Needle nose pliers (for oil strainer removal)
  • Drain pan (to catch old oil)
  • Replacement oil filter (specific to KTM 350 EXC-F)
  • Fresh engine oil (KTM recommends a high-quality 4-stroke oil; check your owner's manual for capacity and spec, typically 1L for a full change)
  • Replacement crush washer (recommended for drain bolt to prevent leaks)
  • Torque wrench (optional but recommended for tightening bolts to correct spec)
  • Shop towels/paper towels
  • Funnel (to make refilling easier)
  • Brake cleaner (to clean up any spills)

Model-Specific Call-Outs

  • The 2023 KTM 350 EXC-F shares its engine oil change procedure with 2023+ 350 SX-Fs and 250s. The steps below also apply to the 2022 Factory Edition up through at least the 2026 model year, though always consult your manual for updates.
  • The oil fill cap and main drain plug location remain consistent, but always verify for subtle changes in future year models.
  • Torque spec for small fasteners is very light (approx. 7.4 Nm)–over-tightening is a common owner error and can cause damage.
  • Always inspect the oil strainer and filter for debris as a wear check; excessive particles may signal internal engine problems.

Step-by-Step Oil Change Procedure

  1. Warm Up the Engine
    • Start your bike and let it idle for 2–3 minutes.
    • This warms the oil, making it flow better and carrying contaminants in suspension for removal.
  2. Prepare Your Work Area
    • Place the bike upright on a stand.
    • Make sure you have all your tools, oil, and supplies at hand.
    • Put a drain pan under the engine's main drain bolt.
  3. Remove the Main Drain Bolt
    • Use a 13mm socket to remove the main oil drain plug, located underneath the engine, in the rear area.
    • Be cautious: the oil will be hot. Allow all oil to drain out.
    • Remove the old crush washer and replace it with a new one if necessary.
  4. Remove the Oil Strainer
    • With the drain pan still in place, locate the oil strainer bolt (also 13mm).
    • Remove this bolt carefully, as there may be more oil inside.
    • Using needle nose pliers, extract the strainer itself. Inspect for debris and clean thoroughly.
  5. Remove & Replace the Oil Filter
    • Locate the oil filter cover (may require an 8mm socket to remove cover bolts).
    • Take out the old oil filter and discard properly.
    • KTM recommends laying the bike on its right side and filling the filter housing 1/3 full with new oil before inserting the new filter. This helps reduce dry starts.
    • Install the new filter, ensuring seals and the cavity are clean.
    • Replace the filter cover and tighten gently. Do not over-torque. These bolts typically require only about 7.4 Nm.
  6. Reinstall the Oil Strainer and Drain Bolts
    • Reinstall the cleaned oil strainer and its bolt.
    • Tighten both the strainer and the main drain bolt snugly, ideally to manufacturer torque spec. Over-tightening may strip threads.
  7. Refill the Engine With Fresh Oil
    • Remove the oil fill cap (on the opposite side from the drain bolts).
    • Using a funnel, pour in new oil to the specified volume (typically around 1L for the 2023 KTM 350 EXC-F).
    • Replace and tighten the fill cap.
  8. Start and Prime the Engine
    • Before fully starting, use the electric start button but only tap it a few times to rotate the engine without firing. This helps cycle and prime the oil system.
    • After priming, start the engine and let it idle for a minute. Check for leaks at the drain and filter cover.
    • Stop engine and wait a couple of minutes, then check oil level via the inspection window or dipstick as outlined in your manual. Top off as needed.
  9. Clean Up
    • Wipe any spilled oil with a towel and brake cleaner.
    • Dispose of the old oil and filter responsibly, following local environmental regulations.

Tips and Reminders for Your 2023 KTM 350 EXC-F

  • KTM strongly recommends frequent oil changes when riding hard (every 15–20 hours for aggressive use, up to 30 hours for light trail riding) for the best engine life.
  • Always use the correct oil type and replace both filter and crush washer each oil change for best results.
  • The filter housing bolts are easily over-torqued and damaged—tighten only to the minimum required.
  • Carefully inspect drained oil for metal shavings or debris, which could indicate early wear inside the engine.

For official KTM parts, supplies, and expert advice, trust MotoSport.com—the rider's partner for all your KTM needs.

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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.