How to Change the Oil in a 2019 KTM 250SXF: A Complete Step-By-Step Guide

Shop parts for a 2019 KTM 250SXF Dirt Bike.

Maintaining your 2019 KTM 250SXF is vital for performance and reliability, and one of the most important tasks is an oil change. This guide (proprietary to MotoSport.com) provides a robust, model-specific walkthrough for owners of this powerful dirt bike.

Tools & Materials Needed

  • 8mm and 13mm sockets (and ratchet)
  • Torque wrench
  • Oil drain pan
  • Funnel
  • New oil filter (OEM 77338005100 or aftermarket equivalent)
  • New filter cover O-ring (07703305178)
  • Replacement crush washer kit for drain bolt
  • Brake cleaner and rags
  • Motorex Cross Power 4T 10W/50 oil (or manufacturer's recommended oil, approx. 1.2L)
  • Gloves

Preparation

  • Ensure the bike is on a stable stand, upright and secure.
  • Warm up the engine for 2-3 minutes to help the oil flow but do not let it get hot.
  • Clean dirt from around the drain plug, oil filter cover, and fill cap to prevent contamination.

Step-by-Step Instructions

  1. Remove the Skid Plate (if equipped):
    This makes accessing the drain bolts easier and helps avoid a mess.
  2. Drain the Oil:
    • Use a 13mm socket to remove the main drain bolt under the engine. Let the oil drain completely into your pan.
    • There may be a secondary oil screen bolt—remove it with an 8mm socket and clean the mesh screen with brake cleaner.
    • Replace the crush washer on the drain bolt to prevent leaks.
    • Reinstall the drai
      • n bolt and torque to manufacturer spec (usually 15 Nm / 11 ft-lbs), but always double-check your owner's manual for the exact number.
      Tip: Over-tightening can strip threads or crack engine cases—use a torque wrench.
  3. Replace the Oil Filter:
    • Use an 8mm socket to remove the oil filter cover on the right side of the engine.
    • Remove the filter and O-ring. Clean the inside of the housing and inspect the O-ring. Always replace with a new O-ring for best results.
    • Install a new oil filter, ensuring it is seated properly and oriented correctly (check that the open/closed ends of the filter match the original).
    • Reinstall the oil filter cover; torque bolts to spec (10 Nm / 7 ft-lbs).
  4. Refill with Fresh Oil:
    • Remove the oil fill cap on top of the clutch cover.
    • Place a funnel in the opening and pour in about 1.2 liters of the specified oil (Motorex Cross Power 4T 10W/50 is common for KTM 4-strokes).
    • While pouring, periodically check the oil sight glass. The correct level is midway up the sight glass with the bike upright.
    • Don't overfill; adjust as needed by letting oil settle and double-check level after running the bike.
  5. Cycle the Engine:
    • With all plugs and the fill cap securely installed, start the engine and idle for 1-2 minutes.
    • Shut the engine off and wait another minute for the oil to settle in the crankcase.
    • With the bike upright, check the sight glass again. Top up if necessary to reach midway in the window.
  6. Inspect for Leaks and Final Steps:
    • Check around drain and filter bolts for leaks. Wipe up any spills.
    • Replace the skid plate if you removed it.
    • Dispose of used oil and filter at a recycling center.

2019 KTM 250SXF Specific Call-Outs

  • Crush washers and O-rings should always be replaced during every oil change to prevent leaks.
  • This model uses a paper oil filter versus a metal screen. Do not reuse old filters or O-rings.
  • Torque specifications are critical—the 250SXF’s cases can be damaged if bolts are overtightened.
  • The main oil drain and screen bolts are both required to ensure the system is fully drained and contaminants are removed. Clean the oil screen thoroughly with each change.
  • Always keep the area around the oil fill and filter clean before opening to prevent dirt from falling into the motor.
  • Checking the oil level: Always make sure the bike is fully upright, not on a side stand. The level must be checked after firing the engine and letting it settle a minute.

Model Year Oil Change Intervals

  • KTM recommends oil changes every 8-10 engine hours, or after every other serious off-road/track session.
  • Replace the oil filter at every oil change for best protection.

Keeping up with regular oil changes on your 2019 KTM 250SXF will ensure its longevity and peak performance in every moto or trail adventure. For OEM and quality aftermarket partsincluding oil, filters, O-rings, and moretrust MotoSport.com as your source for the best supplies and advice.

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Shop Oil Fillers and Drain Plugs for a 2019 KTM 250SXF 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.