How to Change the Oil in a 2019 Husqvarna TX300 – The Complete Guide by MotoSport.com
Shop parts for a 2019 Husqvarna TX300 Dirt Bike.
Performing regular oil changes on your 2019 Husqvarna TX300 is crucial for optimal performance and longevity. The TX300, as a two-stroke dirt bike, utilizes transmission oil (not engine oil as in four-strokes), and the process is straightforward but essential for all riders who want to keep their machine running smooth on the track or trail.
Tools and Supplies Needed
- Socket set (8mm or 13mm, confirm drain plug size for your year/model)
- Torque wrench
- Oil drain pan
- Funnel (a small one is ideal)
- Measuring cup or graduated container
- Fresh transmission oil (Recommended: Motorex BEXL 10W/40 or equivalent, check your manual for alternatives)
- New crush washer (always replace this with each oil change)
- Clean rags
- Contact cleaner (optional, for cleaning up any spills)
- Gloves (optional but recommended)
Oil Specifications and Capacity
- Recommended oil: BEXL 10W/40 or equivalent gear oil
- Capacity: 800 ml (0.8 liters) for the 2019 TX300 as specified in the owner's manual. Some riders fill to the visible level on the sight window or until it weeps out the level screw, but 800 ml is factory spec for this year.
- Recommended interval: Change every 10–15 hours of riding, or after every harsh/race session for best clutch and gearbox longevity.
Step-by-Step: Oil Change Procedure
- Warm Up the Bike
- Start your TX300 and let it idle for a couple of minutes to warm the oil. This helps suspend debris and drain the oil thoroughly.
- Stabilize and Prepare
- Place the bike on a stand to keep it vertical and steady. Remove any skid plate for better access if needed. Set your oil drain pan under the drain plug.
- Remove Drain Plug
- Locate the transmission oil drain bolt on the underside or left side of the engine case (consult your owner's manual diagram).
- Use the appropriate socket to loosen and remove the drain bolt. Avoid letting the bolt fall into the drain pan or funnel.
- Allow all oil to drain; tilting the bike slightly side to side helps empty residual oil.
- Inspect and Replace Washer
- Clean the drain bolt thoroughly, removing any metal debris stuck to its magnet (if equipped).
- Always replace the crush washer with a new one to prevent leaks upon reassembly.
- Reinstall Drain Plug
- Thread the drain bolt in by hand to avoid cross-threading, then torque it to the spec in your service manual (typically around 10-15 Nm, but double-check for your exact year/model).
- Refill with Fresh Oil
- Remove the oil fill cap, usually located on the clutch/ignition side cover.
- Using a measuring cup, pour exactly 800 ml of recommended oil into the gearbox. A small funnel makes this easier and neater. Some riders opt to add oil until it just begins to weep out the level check bolt (if equipped), but for the 2019 TX300 the measured 800 ml is advised for consistent results.
- Reinstall and snug the oil fill cap.
- Check for Leaks and Final Inspection
- Wipe away any oil spills. Start the engine and let it idle for a minute, then check under the bike for leaks at the drain bolt.
- Inspect oil level using the sight glass or level screw (if equipped); top up if necessary, but do not overfill.
Model-Specific Call-Outs for the 2019 Husqvarna TX300
- The TX300's drain plug is sometimes hidden by skid plates; removing them streamlines the process.
- This model uses a separate transmission oil system, so never use two-stroke premix here—only fill with the specified gear/transmission oil.
- Some TX300s have a sight window for checking oil level. If your bike only has a fill bolt and level check bolt, tighten the level check bolt once oil just barely begins to overflow from the check port.
- Always check for any metal particles on the drain plug's magnet; excessive shavings may indicate abnormal gearbox wear.
- Never attempt to reuse crush washers, as leaks can develop on these models without a proper seal.
Additional Tips
- Dispose of used oil and old washers responsibly at your local moto shop or designated recycling center.
- Track oil change intervals in your manual or a maintenance log for best results.
- If you ride in muddy or wet environments, consider more frequent oil changes, as contaminants can work their way into the gearbox through the vent.
Changing the transmission oil on the 2019 Husqvarna TX300 is a straightforward task, but attention to detail ensures you get years of top performance from your machine. All the parts, oils, and crush washers you need are available at MotoSport.com – your one-stop shop for dirt bike maintenance.
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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.