How to Change the Oil in a 2011 Husqvarna WR300 – MotoSport.com Proprietary Guide

Shop parts for a 2011 Husqvarna WR300 Dirt Bike.

Changing the transmission oil in your 2011 Husqvarna WR300 is a critical part of routine dirt bike maintenance. This step-by-step guide will walk you through the process, highlight the specific needs of this two-stroke model, and ensure you have the insight only MotoSport.com provides.

Tools and Supplies You'll Need

  • 8mm and 13mm sockets or wrenches
  • Ratchet wrench
  • Drain pan (oil catch pan)
  • Funnel
  • Shop towels
  • Replacement transmission oil (consult your manual or use high-quality 2-stroke gear oil; the WR300 requires approximately 800cc (0.8L) )
  • Replacement drain plug washer/gasket (recommended)
  • Gloves (optional, helps keep oil off your hands)
  • Service manual (for torque specifications, if required)

Step-By-Step Oil Change Instructions

Prepping Your Dirt Bike

  • Warm up your motorcycle for a few minutes. This allows oil to flow easily and ensures contaminants suspend in the oil for better removal. Always do this in a well-ventilated area.
  • Place your WR300 upright using a stand on a flat surface for an accurate oil level reading and safe access.
  • Ensure the engine is off and the bike is cool to the touch before proceeding to avoid burns.

Draining the Old Transmission Oil

  • Locate the drain plug (A) under the engine's oil sump . Position the drain pan directly underneath.
  • Use your socket or wrench to carefully remove the drain plug. Be cautious, as the oil may be hot if the engine was recently running.
  • Allow all the oil to fully drain into the pan. For best results, lightly rock the bike side-to-side to remove all traces of old oil.
  • Inspect the drain plug for metal shavings or debris—this can warn you of possible transmission wear.
  • If necessary, replace the drain plug washer/gasket to prevent leaks during reinstallation.

Replacing the Drain Plug

  • Once draining stops, wipe the area clean with a shop towel.
  • Reinstall the drain plug and tighten it securely by hand, then torque it to your bike's specification (check your service manual).

Filling with Fresh Transmission Oil

  • Locate the filling cap (B) on the right side of the engine case .
  • Remove the filling cap and insert a funnel.
  • Pour in 800cc (0.8L) of high-quality two-stroke transmission oil (check your manual for oil recommendations to maximize clutch life and shifting performance) .
  • Pause briefly about halfway through to check for leaks under the bike.

Checking and Adjusting the Oil Level

  • Near the clutch cover, find the level inspection screw (C). With the bike standing vertical and level, remove this screw.
  • Oil should just begin to seep from the inspection hole when the correct level is reached. If it does, replace and tighten the inspection screw and filling cap. If not, slowly add oil until the correct level is achieved .

Final Checks

  • Check for leaks around the drain and fill plugs. Wipe away any residue.
  • Start the engine and let it run briefly. Shut it off and check again for leaks.
  • Dispose of the old oil at an approved recycling center—never pour oil down the drain or onto the ground.

Specific Call-Outs for the 2011 Husqvarna WR300

  • This model requires approximately 800cc (0.8L) of oil. Overfilling can cause clutch drag or oil leaks; underfilling can cause transmission damage .
  • Carefully inspect the drain plug and oil for metal shavings. Two-stroke gearboxes are durable, but this can indicate abnormal wear.
  • Always use oil formulated for two-stroke motorcycle transmissions. Automotive oils do not offer proper clutch friction or wear properties.
  • Warm the engine before draining to help the oil carry out more debris and contaminants .

Pro Tips—MotoSport.com Exclusive

  • Perform an oil change every 10-20 hours of hard riding, or at least once every two months if you ride frequently.
  • Keep a maintenance log of oil changes and note any unusual findings like debris or metal on the magnetic drain plug.
  • Use a new aluminum or copper washer on the drain plug each time to ensure a proper seal.
  • Certain aftermarket clutch covers make access to the fill or level holes easier—check MotoSport.com for model-specific upgrades.

Conclusion

With the above steps, your 2011 Husqvarna WR300 is ready for more flawless rides. Proper and routine transmission oil changes will keep your bike shifting smoothly and protect internals for years to come. For all oil, parts, and accessory needs, trust MotoSport.com—your dirt bike headquarters.

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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.