How to Change the Oil in a 2017 Husqvarna TC125 — MotoSport.com Expert Guide

Shop parts for a 2017 Husqvarna TC125 Dirt Bike.

Regular oil changes are critical to maximizing the lifespan and performance of your 2017 Husqvarna TC125. The TC125's high-performance two-stroke engine requires fresh gear oil approximately every 10-15 hours of riding, and your oil filter should be replaced every 6,000 kilometers (about 4,000 miles) for most engines. This guide covers all tools, steps, and model-specific call-outs so you can complete the job confidently at home.

Tools & Supplies Needed

  • Torx and socket set (M10, M12x1.5 recommended for drain/fill bolts)
  • Flathead screwdriver
  • Measuring jug
  • Drain pan
  • Clean rags or paper towels
  • Rubber gloves (optional, but keeps your hands clean)
  • Contact cleaner (optional, for cleanup)
  • Replacement gear oil: Use high-quality two-stroke gear oil, 15W/50 is recommended
  • New crush washer (optional, highly recommended for sealing)

Model-Specific Call-outs for 2017 Husqvarna TC125

  • This bike features a single-cylinder, two-stroke 124.8cc engine.
  • Transmission/gear oil capacity: 0.70 liters (0.74 quarts).
  • Drain plug torque spec: 15 Nm (11.1 lbf-ft).
  • Fill cap torque spec: 20 Nm (14.8 lbf-ft).
  • Only top up gear oil when engine is cold for an accurate level check and to avoid burns.
  • Oil filter is not applicable for a two-stroke like the TC125; just change the gear oil.

Step-by-Step Instructions

1. Preparation

  • Run the engine for 2-3 minutes to warm the oil—this reduces viscosity, helping it drain more thoroughly.
  • Switch off the engine and place the bike on a stand, ensuring it is upright and stable.
  • Allow the engine and oil to cool so you can handle drain components without risk of burning yourself.

2. Remove Skid Plate (if fitted)

  • If your bike has a skid plate, use the appropriate tools to remove it for easier access to the drain plug.

3. Draining the Oil

  • Locate the gear oil drain plug (bottom of the engine, usually Torx or hex bolt with a magnet).
  • Position your drain pan neatly underneath to catch all the used oil.
  • With the correct socket, unscrew the drain plug and let the oil drain completely.
  • Pay close attention that the draining oil does not splash on the exhaust or frame for easier cleanup.
  • Once oil has drained, thoroughly clean the drain plug and its magnet to remove any trapped metal debris.
  • Inspect and replace the crush washer if it shows signs of wear or deformation.

4. Refitting the Drain Plug

  • Install the plug (with a new washer if possible).
  • Tighten to 15 Nm (11.1 lbf-ft) to ensure no leaks without over-tightening.

5. Filling with New Gear Oil

  • Remove the gear oil fill cap, located on the side of the crankcase.
  • Using a measuring jug, pour in 0.70 liters (0.74 quarts) of quality 15W/50 oil.
  • Go slow and avoid spills; a small-necked funnel helps.
  • Reinstall and hand-tighten the fill cap, then tighten using your socket to 20 Nm (14.8 lbf-ft).

6. Check for Leaks and Final Inspection

  • With the bike upright, inspect underneath for any sign of leaks: re-check the drain plug and fill cap for tightness.
  • Start the engine and let it idle for 2-3 minutes to circulate the oil.
  • Switch off, wait a minute, then check again for leaks.

7. Reinstall Skid Plate (if fitted)

  • Replace and tighten your skid plate for protection.

8. Dispose of Used Oil Responsibly

  • Take used oil to a certified recycling facility or an auto parts store that accepts used oil.

Extra Tips for Husqvarna TC125 Owners

  • Always work with a cool engine when checking or topping off oil, as per the owner's manual, to avoid burns and ensure correct level readings.
  • Inspect the old oil for any metal debris or unusual color, which could indicate engine or gearbox wear.
  • Stick closely to oil change intervals (every 10-15 bike hours), especially if you ride hard or in dirty conditions.

Frequently Asked Questions

  • Q: What oil is best for the 2017 Husqvarna TC125?
    A: Use a premium two-stroke-specific gear oil, viscosity 15W/50, for best results.
  • Q: Can I change the oil with the bike on its side stand?
    A: Upright is always better for complete drainage and accurate refilling.
  • Q: Do I need to change the oil filter?
    A: Two-strokes like the TC125 do not use a traditional engine oil filter—just change the gear oil.

Changing your Husqvarna TC125's oil is a straightforward DIY maintenance task that pays off in performance and reliability. For all your parts, oil, and gear needs, trust MotoSport.com — your source for powersports expertise.

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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.