How to Change the Oil in a 2013 Husqvarna WR300 – A Complete MotoSport.com Guide

Shop parts for a 2013 Husqvarna WR300 Dirt Bike.

Routine oil changes are vital to the longevity and performance of your 2013 Husqvarna WR300 two-stroke dirt bike. This guide is designed exclusively for MotoSport.com customers and provides step-by-step instructions, model-specific tips, and a comprehensive tool list to ensure a thorough, mess-free oil change every time.

Tools and Supplies Needed

  • Transmission/gear oil – Use only the oil type and quantity specified by the manufacturer: 800 ml (800 cc) of high-quality transmission oil. Refer to your owner’s manual for the recommended spec and brand, but full synthetic 15W-50 is commonly used and widely available.
  • Socket wrench set (to remove the drain plug and filler cap)
  • Drain pan (to catch old oil)
  • Oil funnel (for a clean pour when adding new oil)
  • Clean shop towels or rags (for wiping up spills and cleaning surfaces)
  • Latex/nitrile gloves (to protect your hands from oil)
  • Torque wrench (optional, for precisely tightening plugs to spec)
  • Small flat screwdriver or pick (if O-ring needs to be replaced or removed)
  • Replacement drain plug washer/seal (recommended for each oil change for optimal sealing)

Step-by-Step Instructions

1. Prepare Your Work Area and Bike

  • Warm up the engine – Start your WR300 and let it idle for 3–5 minutes. This helps suspend contaminants in the oil and thins it for easier draining

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  • Find a flat, stable surface to set your bike upright using a stand. This ensures accurate oil draining and re-filling.
  • Put on protective gloves and ensure you have all your tools and supplies within reach.

2. Locate and Remove the Oil Drain Plug

  • The 2013 WR300 has its oil drain plug (plug A) located under the crankcase, usually on the lower right side. Consult your manual or visually confirm for your chassis configuration

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  • Place your drain pan directly underneath the plug.
  • Using the appropriate socket, loosen and carefully remove the drain plug, allowing old oil to flow completely into the pan.
  • To ensure all oil drains, consider tilting the bike slightly toward the side of the drain plug by about 30 degrees

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3. Let the Oil Drain Completely

  • Be patient—wait several minutes for all the oil to empty from the case. Warm oil drains faster and more thoroughly.
  • Inspect the drain plug and magnet (if equipped) for metallic debris, which might indicate internal wear. Clean if necessary.
  • Replace the copper or aluminum sealing washer if it shows signs of wear or flattening.

4. Re-Install the Drain Plug

  • Thread the drain plug back in by hand to avoid cross-threading, then snug it down with a socket wrench.
  • If using a torque wrench, tighten to the manufacturer’s specified value (typically around 11 ft-lbs for most Husqvarna two-stroke drain plugs, but always check your manual)

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5. Fill with Fresh Oil

  • Locate the oil fill cap (plug B), usually found on the right engine cover. Remove it carefully.
  • Position your clean oil funnel in the opening and pour in 800 ml of fresh transmission oil slowly.
  • Pause halfway through; use the inspection/level screw (plug C) to verify oil level if desired

    . The oil should reach and gently ooze out the level check hole when the bike is upright.
  • Once the correct amount is added, replace and snug the fill cap securely.

6. Final Checks and Cleanup

  • Inspect around the drain plug and fill cap for leaks.
  • Wipe away any spilled oil from the engine and chassis with a shop towel.
  • Dispose of used oil at a motorcycle shop or recycling center—never down a drain or in the trash.
  • Run the engine briefly and check for leaks again, retorque fasteners as needed.

Model-Specific Call-Outs for the 2013 Husqvarna WR300

  • Transmission oil capacity is 800 ml. Overfilling can cause excess pressure and leaks; underfilling can damage gears and bearings

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  • Use warmed-up engine for oil changes to ensure contaminants are removed

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  • Always check the condition of the O-ring or sealing washer on the drain plug for every oil change. Replace if flattened or cracked.
  • If you ride in extremely dusty or wet conditions, you may want to change transmission oil more frequently than the manufacturer’s interval.
  • The WR300 transmission is separate from the engine’s fuel mix—there is no oil filter to change on this two-stroke transmission system.

Tips for a Successful Oil Change

  • If you don’t have a graduated container, use a measuring cup or fill slowly while watching the oil level check screw until oil just starts to escape.
  • Old gaskets and washers are common causes of leaks after oil changes. Always keep a few spares with your supplies.
  • Record your oil change date and hours of operation to track maintenance—and protect your Husqvarna’s resale value.

Summary

Changing the transmission oil on a 2013 Husqvarna WR300 is a straightforward job any rider can do. As long as you use the correct quantity and type of oil, work carefully, and double-check each step, you’ll keep your bike shifting smoothly and performing at its best for every ride.

Related Shopping Categories

Shop Motor Oil for a 2013 Husqvarna WR300 Dirt Bike.

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Shop Tools for a 2013 Husqvarna WR300 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2013 Husqvarna WR300 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.