How to Change the Oil in a 2026 Yamaha TTR125L — MotoSport.com
Shop Parts for a 2026 Yamaha TTR125L Dirt Bike.
Changing the oil in your 2026 Yamaha TTR125L is a straightforward yet critical maintenance task that keeps your dirt bike running strong and lasting longer. Below is a robust, step-by-step guide, including the tools you'll need and special model-specific call-outs every TTR125L owner should know.
Tools & Supplies You'll Need
- Socket wrench set (including 17mm socket)
- Oil drain pan
- Funnel
- Clean rags or shop towels
- Fresh engine oil (Yamaha Yamalube 10W-40 recommended)
- Replacement crush washer for drain bolt (recommended)
- Latex or nitrile gloves (optional, but keeps hands clean)
Preparation
- Warm up the bike: Start the engine and let it idle for a few minutes. Warm oil drains more easily and carries away more contaminants. Shut off the engine before proceeding.
Tip: While waiting, inspect for any visible oil leaks or damage. - Stabilize the bike: Put the bike on its kickstand (the TTR125L leans perfectly for draining), or have a friend help keep it upright.
Step-by-Step Oil Change Instructions
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Locate the drain bolt
The oil drain bolt is on the left side of the bike, near the base of the engine ("by the waffles," as some like to say), making access easy compared to many other bikes.
Model Note: This location has remained consistent for TTR125L models for years, including the 2026, so older video guides apply here as well.
Source: -
Drain the old oil
Place your oil drain pan under the drain bolt. Use the 17mm socket to loosen and remove the bolt.
Caution: Oil may be hot. Allow all oil to drain completely.
Tip: You can slowly tip the bike upright to ensure full drainage. Gently kick the starter a couple times to help evacuate old oil, but do not start the engine.
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Replace the crush washer (recommended)
Yamaha recommends replacing the crush washer on the drain bolt each time you perform an oil change. This helps prevent leaks.
Model Note: Consult your owner's manual for the correct washer size and torque value. -
Reinstall the drain bolt
Wipe the drain bolt and the mounting surface clean with a rag.
Tighten the bolt securely but do not over-torque – it should be snug, not so tight that you risk stripping the threads.
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Add fresh oil
Locate and remove the oil filler cap/dipstick – on the TTR125L, this is on the left engine case.
Using a funnel, choose your oil carefully (Yamalube 10W-40 or equivalent, check owner's manual for volume – typically about 1L), and slowly pour oil in. Reinstall the filler cap/dipstick. -
Check the oil level
With the bike upright (not leaning on the kickstand), remove the dipstick and wipe it clean. Reinsert (do not screw in), then withdraw and check oil level – it should be between the minimum and maximum marks.
Repeat if necessary: Add oil in small amounts as needed.
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Start the engine and inspect
Let the engine idle for a minute to circulate the new oil. Check the drain bolt and filter area for leaks.
Shut the engine off, wait a few minutes, and recheck the oil level, topping up if necessary. -
Dispose of old oil properly
Take your used oil to a certified recycling center. Never dump it outside or in the trash.
Model-Specific Call-Outs for the 2026 Yamaha TTR125L
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Oil Change Frequency: Yamaha recommends changing the oil after every 10 hours of riding or at least every 3 months, whichever comes first. Frequent oil changes are especially important for dirt bikes run in harsh or dusty environments.
Source: - Crush Washer: The 2026 TTR125L uses the same size drain bolt and washer as prior years – failure to replace can lead to leaks.
- Torque Spec: Always check the official Yamaha Service Manual for the correct torque for your drain bolt. Overtightening can strip the case; undertightening can cause leaks.
- Oil Capacity: Refer to the side of the engine case for stamped oil capacity – typically about 1L, but always confirm with the owner's manual and never overfill.
Pro Tips for the TTR125L Owner
- Keep extra oil and crush washers on hand – it makes future oil changes quick and stress-free.
- Check oil before every ride as a safety habit, in addition to regular changes.
- Record your maintenance – log oil change dates and hours ridden to track service intervals.
Maintaining your 2026 Yamaha TTR125L with regular oil changes is one of the easiest ways to get more fun, power, and longevity out of your dirt bike. For all parts, fluids, and Yamaha accessories, trust MotoSport.com — the destination for riders who want to do the job right, every time.
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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.