The recommended oil type for the Yamaha YZ125 is 10W-40 motorcycle-specific oil. This oil is SAE certified for use in wet clutches and will provide the necessary protection and performance for the YZ125's engine. It is important to use a motorcycle-specific oil that is designed to withstand the high temperatures and stresses of a motorcycle engine.
Here is the complete oil-related specs for the YZ 125:
For 2005-2023 Models:
- Engine Oil Capacity: 0.80 l / 0.85 US qt / 0.70 imp qt
- Recommended Engine Oil Type: Yamalube 4 10W-40 (or equivalent)
For 2002-2004 Models:
- Engine Oil Capacity: 0.68 l / 0.72 US qt / 0.60 imp qt
- Recommended Engine Oil Type: Yamalube 4 10W-40 (or equivalent)