How to Change the Oil in a 2017 Husqvarna TC85: A MotoSport.com Exclusive Guide

Shop parts for a 2017 Husqvarna TC85 Dirt Bike.

Changing the gear oil is a critical part of maintaining your 2017 Husqvarna TC85 and ensuring maximum engine longevity and performance. This bike uses a 2-stroke engine with a separate gearbox oil system—regular oil changes prevent premature clutch and transmission wear. This step-by-step guide is proprietary to MotoSport.com and tailored to the specific requirements of the 2017 TC85.

Tools and Materials Needed

  • 10mm socket or wrench – For the drain bolt.
  • Torque wrench – Ensures correct reinstallation torque.
  • Oil drain pan – To collect old oil.
  • Funnel – For refilling oil.
  • Rags or shop towels – For cleaning up spills.
  • Fresh gear oil – Husqvarna specifies 500cc (0.5 liters) of the correct grade; check your owner’s manual for Husqvarna’s latest recommendations.
  • Replacement crush washer (optional but recommended).
  • Gloves – To keep hands clean.

Step-by-Step Instructions

  1. Warm Up the Engine
    Start the bike and let it idle for 3-5 minutes. This thins the oil, allowing it to drain more completely. Shut off the engine before beginning the oil change.
  2. Stabilize the Motorcycle
    Place the TC85 upright on a suitable stand and ensure it is secure and level on a hard, horizontal surface. This step is essential for both draining and refilling to proper levels

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  3. Locate the Oil Drain Bolt
    The oil drain bolt is underneath the engine, near the left or right bottom case. Position an oil drain pan directly beneath it.
  4. Remove the Drain Bolt
    Use a 10mm socket or wrench to loosen and remove the bolt. Let the oil fully drain into your pan. If reusing the crush washer, check it for damage; replace if needed for a good seal.
  5. Inspect the Oil
    While waiting, look at the drained oil for metal shavings or debris—these can indicate excessive wear and may warrant further inspection.
  6. Refit the Drain Bolt
    After completely draining, reinstall the drain bolt with the washer. Use a torque wrench to tighten it to the factory-specified torque (check your manual for exact value).
  7. Remove the Fill Plug
    The filler cap is typically found on the side of the engine case. Remove it using your hand or an appropriate tool.
  8. Add Gearbox Oil
    Insert a clean funnel and pour in 500cc (0.5 liters) of the recommended gear oil. Do not overfill.
  9. Check the Oil Level
    The TC85 uses a level check screw located near the clutch cover. With the bike upright, remove this screw. A small amount of oil should dribble from the hole; this confirms the correct level. If not, add oil a little at a time, then re-check until you observe this

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  10. Refit the Fill Plug and Level Screw
    Reinstall both, tightening to specification.
  11. Wipe Down and Dispose
    Clean up any oil residue. Properly dispose of used oil at a recycling center.

2017 Husqvarna TC85-Specific Call-Outs

  • Oil Specification: Always use the factory-recommended gear oil and be precise—do not exceed 500cc (0.5 L). Excess oil can cause leaks or clutch slippage

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  • Level Check: Accurate oil level is established by removing the level screw with the bike perfectly upright. Don’t skip this; incorrect level can lead to gear or clutch issues

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  • Crush Washer: These are designed for a single-use seal—replace them every oil change for peace of mind.
  • Regular Service Interval: For best results, change oil every 10-15 hours of riding, or more frequently under extreme use.

Pro Tips for a Clean, Easy Oil Change

  • Warm, not Hot: Let the engine cool for a few minutes after running; this reduces burn risk from hot engine cases and oil.
  • Keep it Upright: Maintaining a level stance is essential for accurate draining and refilling. Do not tip the bike during the process.
  • Use Quality Tools: A proper torque wrench prevents under- or over-tightening, protecting engine cases.
  • Stay Organized: Lay tools out in advance and keep rags handy to catch any drips.

Conclusion

Changing the gear oil in your 2017 Husqvarna TC85 is a straight-forward, essential maintenance task. Using the correct oil and process preserves the health of your transmission and clutch. Always consult your owner’s manual for up-to-date specifications and torque values. For OEM and performance parts, service tools, and more expert advice, trust MotoSport.com—your ride, our passion.

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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.