How to Change the Oil in a 2019 Sherco 450 SEF FACTORY

Shop parts for a 2019 Sherco 450 SEF FACTORY Dirt Bike.

Regular oil changes are essential maintenance for ensuring optimum performance and longevity of your 2019 Sherco 450 SEF FACTORY. This step-by-step guide, proprietary to MotoSport.com, walks you through the complete process, highlights required tools and specific tips unique to this model.

Tools & Supplies Needed

  • 17mm socket (for drain bolt)
  • 8mm socket (for oil filter cover)
  • 4mm Allen/Hex key (for various bolts)
  • Torque wrench (for reinstallation)
  • Oil catch pan
  • Clean rags
  • Gloves (recommended for safety)
  • Replacement crush washers (optional but advisable for the drain bolt)
  • New oil filter (compatible with the 2019 Sherco 450 SEF FACTORY; e.g., K&N cartridge style filter)
  • Engine oil (consult your owner’s manual for viscosity and capacity, typically high-quality synthetic 4T oil)
  • Funnel (for mess-free refill)

Preparation

  • Ensure your bike is on a stable, level surface, ideally on a stand.
  • Start the engine and let it warm up for a few minutes. Warm oil drains more completely, taking unwanted particulates with it.
  • Turn off the engine and allow a few minutes for components to cool down to touch-safe temperatures.

Step-By-Step Oil Change Instructions

  1. Locate and Remove Drain Bolts
    • The 2019 Sherco 450 SEF FACTORY has two oil drain bolts at the bottom of the crankcase. Use a 17mm socket for primary drain bolts. Place the oil pan directly beneath.
    • Loosen and remove both drain bolts, allowing oil to flow into the pan. Be aware oil might be hot. Remove the crush washers as well — replace if worn or after several uses to ensure a consistent seal and prevent leaks.
  2. Remove and Replace the Oil Filter
    • Locate the oil filter cover (typically on the side of the engine) and remove the three bolts holding the cover using an 8mm socket or 4mm Allen key as required.
    • Carefully pull the cover off. The oil filter may come out with the cover or remain in the cavity.
    • Remove the old oil filter and inspect the filter cavity for debris. Clean as needed using a lint-free cloth. Always compare the new filter with the old one to ensure you have the correct part (the 2019 Sherco 450 SEF FACTORY uses a cartridge style oil filter – K&N and OEM options available).
    • Lightly oil the new filter’s O-rings, then insert it into the cavity. Reinstall the cover, tightening bolts evenly in a crosshatch pattern to factory spec (reference your owner’s manual for exact torque settings).
  3. Inspect and Reinstall Drain Bolts
    • Clean the drain bolts thoroughly and install new crush washers if you’re reusing them. Start both bolts by hand to avoid cross-threading.
    • Tighten drain bolts with a torque wrench to the specified value (consult Sherco’s service manual; typically 10 Nm) for a leak-free seal.
  4. Refill With New Oil
    • Using a clean funnel, pour the recommended type and amount of oil into the filler port (typically on top of the right engine cover). Double-check oil volume in your manual; it’s generally about 1.3-1.5 liters for the 450 SEF FACTORY, but verify per your bike’s marking or dipstick.
    • Allow a moment for the oil to settle and check the level using the sight glass (if equipped) or dipstick. Top up if necessary, but do not overfill.
  5. Start and Check Engine
    • Start your bike and let it idle briefly. Shut it down, wait a minute, then re-check the oil level, topping off if needed.
    • Inspect the drain bolts and oil filter cover for leaks and ensure everything is clean and tight.
  6. Dispose of Old Oil Properly
    • Pour used oil into a sealed container and take it to a recycling center or auto shop that accepts oil and filters.

Sherco 450 SEF FACTORY-Specific Tips and Call-Outs

  • This model uses two drain bolts; ensure both are removed and reinstalled.
  • Always use correct torque (10 Nm for most bolts in the oil system) to prevent damage to the alloy engine cases.
  • Replace the oil filter with a high-quality cartridge filter. Some aftermarket filters like K&N’s are designed for high oil flow and synthetic compatibility.
  • Never use an impact gun on the oil bolts. Always hand-tighten and use a torque wrench for the final tighten.
  • Keep an eye on crush washers – replace when worn, as failure here is a common cause of leaks.
  • Use only motorcycle-specific four-stroke oil that meets or exceeds the manufacturer’s requirements for JASO MA/MA2 spec.
  • Change intervals are typically every 20-30 hours of riding but monitor oil condition and adjust based on your riding style and environment.

Conclusion

Changing your oil routinely protects the investment you’ve made in your 2019 Sherco 450 SEF FACTORY and maintains Factory-level performance. Refer to your owner’s manual and Sherco service documentation for spec numbers, and always use quality products. For expert tools and motorcycle oils, visit MotoSport.com for everything you need.

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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.