How to Change the Oil in a 2017 Suzuki DR-Z125L: Step-by-Step Guide

Shop DR-Z125L Parts for a 2017 Suzuki DR-Z125L Dirt Bike.

Changing the oil in your 2017 Suzuki DR-Z125L is a vital part of regular maintenance and ensures your dirt bike runs smoothly and reliably for years to come. This simple DIY job can save you both time and money, and with the right steps, even beginners can handle it safely and efficiently.

Tools and Supplies Needed

  • 10mm socket and ratchet/wrench (for oil filter cover bolts)
  • 21mm socket and ratchet/wrench (for drain plug)
  • Torque wrench (to tighten drain bolt precisely; target 20.5 lb-ft)
  • Oil drain pan (for catching old oil)
  • Funnel (for clean oil refill)
  • Shop towels or rags
  • Gloves and long-sleeve shirt (for protection from oil)
  • Fresh oil – 10W-40 four-stroke motorcycle oil, suitable for a wet clutch (approximately 1 quart/950 ml)
  • New oil filter (recommended for every oil change but not strictly required by Suzuki for every change)

Preparation and Safety

  • Warm up the engine for 5-10 minutes to help the oil drain thoroughly. This thins the oil and stirs up residue so it exits the engine easier and more completely

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  • Turn off the engine and allow it to cool slightly until hot, not scalding.
  • Work in a well-ventilated area, away from children and pets. Both new and used oil can be hazardous

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  • Place the bike on the side stand on a level surface.

Oil Drain and Removal Steps

  • Remove the oil filler cap (located on top of the right engine case). This allows air in and helps the oil drain faster

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  • Place the drain pan under the engine's drain bolt (located underneath the right side engine case).
  • Use a 21mm socket to remove the drain plug and its crush washer. Be careful, oil may be hot. Let all the old oil drain out while holding the motorcycle vertically for best results

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  • Inspect the old oil for metal shavings or debris. If excessive, consult a mechanic.

Oil Filter Service (Recommended)

  • The oil filter cover is secured by three 10mm bolts. Remove these carefully and pull the cover free.
  • Remove the old oil filter. Take note of its orientation for correct reinstallation.
  • Clean the oil filter cover and mounting surface to prevent contamination.
  • Install the new oil filter. Lubricate the filter rubber O-ring lightly with fresh oil for a good seal.
  • Reinstall the cover and tighten the bolts evenly.

Reinstall Drain Plug

  • Clean the drain plug threads and install a fresh crush washer if the old one is worn.
  • Thread the drain plug in by hand to avoid cross-threading, then tighten with a torque wrench to 20.5 lb-ft (do NOT overtighten). This prevents leaks and thread damage

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Refill with Oil

  • Insert a funnel into the oil filler opening.
  • Add approximately 950ml (1 quart) of 10W-40 four-stroke motorcycle oil rated for wet clutch use. Avoid car oils with friction modifiers as they can cause clutch slippage

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  • Pour slowly and check for leaks under the engine.

Check Oil Level

  • Stand the bike upright and let it sit for a minute to let oil settle.
  • Remove and clean the dipstick, insert it (do not screw in), and check the oil level.
  • The oil should be between the two notches on the dipstick. Add oil if needed, but do not overfill.

Finishing Touches

  • Reinstall the oil filler cap and tighten by hand.
  • Start the engine and let it idle for a few minutes. Check for oil leaks around the drain plug and filter area.
  • Turn the engine off, allow oil to settle again, and re-check the oil level, topping up if required.

2017 Suzuki DR-Z125L Specific Tips and Call-outs

  • Do not remove the large 17mm bolt found under the engine; this is NOT the oil drain bolt and removal may potentially damage internal parts

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  • The recommended oil quantity is clearly marked next to the filler cap: 950ml standard, 850ml with a full engine strip-down

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  • Always dispose of used oil and filter at a recycling center; never dump oil on the ground or in household trash

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  • For best clutch performance, use only oils certified for wet clutches (look for "MA" or "JASO MA" labels)

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Conclusion

Changing the oil in your 2017 Suzuki DR-Z125L is straightforward, requires only basic tools, and offers peace of mind for every ride. Watch for the correct orientation of bolts and never overfill oil. For safety and reliability, follow the steps methodically, use protective gear, and always double-check oil level after running the engine. Enjoy the ride, and remember, your dirt bike's longevity starts with regular oil changes.

This how-to is proprietary content exclusive to MotoSport.com.

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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.