How to Change the Oil in a 2016 KTM 150SX

Shop parts for a 2016 KTM 150SX Dirt Bike.

Regular oil changes are crucial to keep your 2016 KTM 150SX running smoothly. This guide from MotoSport.com provides a complete, step-by-step instruction set specifically for your bike, with special call-outs for the 150SX’s unique needs. With the right tools and techniques, you can confidently tackle this maintenance task and protect your investment.

Tools and Supplies Needed

  • Metric T-handle socket set (especially 13mm socket)
  • Torque wrench (capable of reading 20 Nm – 14.8 ft-lb)
  • Drain pan
  • Funnel
  • Pliers
  • New gear oil – 15W/50 (refer to your manual’s recommendations)
  • New crush washer for drain plug
  • Rags or shop towels
  • Protective gloves (optional, but recommended)

Model-Specific Call-Outs: 2016 KTM 150SX

  • The 2016 150SX is a two-stroke with a separate transmission oil compartment—what you’re changing is known as “gear oil.”
  • Oil capacity is 0.70 liters (0.74 qt) for factory spec, and up to 0.80 liters (0.85 qt) for top-off, so do not overfill.
    Be sure to check your owner’s manual if in doubt about the model year specifications.
  • Do not skip cleaning the magnetic drain plug—it collects gear particles which are normal but should be removed at every oil change.
  • After draining, always use a fresh crush washer to avoid leaks.
  • The fill bolt/cap is M12x1.5. Check seal ring condition and replace if damaged.

Step-by-Step Oil Change Instructions

  1. Warm up your engine for a couple minutes. This helps the oil thin out and drains contaminants. Turn off the engine before starting any work.
  2. Set the bike on a level surface and secure it with a stand. Remove any skid plate if installed (not required for OEM two-stroke models, but common on race bikes).
  3. Remove the oil fill cap (located on the side of the transmission case). This allows the gear oil to drain more easily by preventing airlocks.
  4. Place a drain pan under the engine, directly beneath the drain plug. The drain plug has a magnetic tip and is typically on the right (shifter) side of the lower engine case.
  5. Using a metric socket (13mm is standard), remove the drain plug carefully. Be cautious: the oil may be hot.
  6. Allow the oil to fully drain into your pan. Take your time—let it drip until nearly stopped.
  7. While draining, inspect and clean the drain plug magnet. A small amount of metallic “fuzz” is normal. Wipe the plug and inspect the sealing surface. Toss the old crush washer.
  8. When oil stops dripping, reinstall the drain plug with a new crush washer. Tighten by hand first, then finish with your torque wrench set to 20 Nm (14.8 ft-lb) to avoid overtightening.
  9. With a clean funnel, pour in 0.70 liters (approx. 0.74 qt) of fresh 15W/50 oil through the fill hole. For hard usage or after full drain, you may use up to 0.80 liters, but do not overfill.
  10. Replace the oil fill cap. Tighten by hand, then use pliers to snug—do not overtighten as this can damage the O-ring or threads.
  11. Wipe up any excess oil. Run the engine briefly, then shut off and check for leaks. Top off if the level is low.

Pro Tips for the 2016 KTM 150SX

  • Do not use automotive engine oils; stick with motorcycle-specific gear oil to protect transmission and clutch performance.
  • If riding in harsh conditions or racing, check your gear oil level more frequently and change after every 5–10 hours of use.
  • Repeatedly finding excess metal on the magnetic plug could indicate abnormal gearbox wear; report this to a qualified mechanic.
  • Always check your owner’s manual for updated torque specs and maintenance intervals.

Final Checklist

  • Oil changed and at proper level
  • Drain plug torqued and sealed
  • Fill cap replaced and secured
  • No leaks after running engine
  • Tools and old oil properly stored/disposed

With these steps, your 2016 KTM 150SX’s transmission will run cooler, last longer, and perform better. For genuine OEM-quality parts and top-rated oils, trust MotoSport.com—your dedicated source for KTM maintenance essentials.

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Shop Oil Fillers and Drain Plugs for a 2016 KTM 150SX 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.