How to Change the Oil in a 2021 Yamaha TTR50: A Step-by-Step Guide
Shop parts for a 2021 Yamaha TTR50 Dirt Bike.
Keeping up with oil changes is crucial for the longevity and performance of your 2021 Yamaha TTR50 dirt bike. The following step-by-step guide will walk you through the entire process, with specific tips and details owners should know. This guide is proprietary to MotoSport.com.
Tools and Materials Needed
- 10W-40 engine oil (use a high-quality motorcycle oil–see notes below for capacity)
- Oil drain pan (catch pan or even a Tupperware in a pinch)
- 17mm socket and ratchet
- Torque wrench (optional, but recommended)
- Funnel
- Rags or shop towels
- Gloves (for cleanliness and grip)
- Motorcycle stand (optional, but helps keep the bike upright and level)
Preparation Steps
- Warm up the engine: Start your TTR50 and let it idle for a few minutes. This ensures the oil drains out more easily and completely because warm oil flows better than cold oil.
- Stabilize the bike: Use a motorcycle stand if you have one. If not, ensure the bike is upright and secure on level ground with the kickstand up if possible.
- Gather your tools and materials nearby.
Step-by-Step Instructions
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Locate the oil drain bolt:
- The oil drain bolt is located on the underside of the engine case. You'll need your 17mm socket for removal.
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Position the oil drain pan:
- Slide the drain pan underneath the drain bolt to catch the used oil.
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Remove the oil drain bolt:
- Carefully loosen the drain bolt (using the 17mm socket), being cautious not to drop the bolt into the oil pan.
- Let all the oil drain out. Be patient and allow a few minutes for complete drainage.
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Replace and torque the drain bolt:
- Once oil ceases to drip, wipe the drain bolt and surrounding area clean.
- Reinstall the drain bolt with its gasket. Use your torque wrench to tighten to the manufacturer specification: 20 N·m (2.0 kgf·m, 14.5 ft-lb) for the 2021 TTR50. Do not over-tighten as this may damage the threads or case, but ensure it's snug and secure .
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Add new oil:
- Unscrew the oil filler cap/dipstick located on the right side of the engine.
- Insert a funnel and pour in 800 ml (0.85 qt) of 10W-40 engine oil .
- Pro tip: Pour about 750 ml first, check the level, and top off as needed to reach the recommended mark . Overfilling can lead to oil entering the airbox and running issues .
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Check the oil level:
- With the bike upright and level, wipe the dipstick clean and fully insert it without screwing it in to check the level .
- The oil should be between the minimum and maximum marks.
- If low, add small amounts and recheck. If too high, remove a little oil; too much oil can cause leaks and poor performance .
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Start the engine and recheck:
- Start the bike and let it idle for a minute. Turn off and allow the oil to settle for a couple of minutes. Recheck the oil level and top up if necessary .
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Dispose of used oil responsibly:
- Take the old oil to a recycling center or appropriate disposal location; never pour used oil on the ground or down a drain.
- Clean your tools and hands.
2021 Yamaha TTR50-Specific Tips & Call-Outs
- This guide applies specifically to 2021 Yamaha TTR50 and is consistent across all TTR50 models from 2006 to present due to the minimal design changes .
- Oil capacity is 800 ml per change–overfilling can cause excess oil to go into the air filter or airbox, resulting in leakage or running issues . Always check the capacity mark on the side of the engine as well.
- Yamaha recommends 10W-40 viscosity for optimal engine protection; always use high-quality oil formulated for motorcycles.
- Change the oil every 10 hours of riding or several times per season, especially if the bike sits unused for long periods .
- Check the drain bolt gasket for wear each time. Replace if damaged to avoid oil leaks.
- No oil filter replacement is necessary on the TTR50.
Frequently Asked Questions
- Can I use thicker oil for hot climates? Yamaha specifies 10W-40, but you can consult your manual or dealer about ambient temperatures and alternatives.
- Is it bad to overfill the oil? Yes. Too much oil can lead to engine blow-by, leaks, and poor bike performance. Always keep the level between the dipstick marks .
Conclusion
Regular oil changes ensure the long life and reliable operation of your 2021 Yamaha TTR50. By following this guide and the recommended intervals, you give your dirt bike the best chance for a trouble-free riding season. For all your dirt bike maintenance needs, trust MotoSport.com—your source for genuine Yamaha parts and professional advice.
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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.