Four-Stroke Engine Oil

Yamalube, the Genuine Yamaha engine oil, was developed in the United States in the early 1970s, and is favored by Yamaha users around the world. As Yamalube technology has advanced right along with Yamaha engines, Yamalube meets the diverse performance requirements for engine oils and is best-suited for Yamaha engines.

The Feature of Engine Oil

  • Higher Performance through Exclusive Development for Yamaha Engines
  • API and JASO Engine Oil Standards Met at High Levels
  • Supporting a Wide Range of Ambient Temperature Changes
  • Superior Engine Detergency
  • Low Engine Oil Consumption


Daily Inspection

Because engine oil is designated as a regular replacement item, it is necessary to change it in accordance with the intervals indicated in the owner's manual for the respective model. Moreover, an engine oil leak check is included in the regular inspection items.

Engine Oil Inspection

Although engine oil is designated as a regular replacement item, to ensure safety, it is best to check the oil level and contamination on a daily basis. For inspection, use the inspection window or the level gauge under the oil filler cap. If the engine oil level is considerably low before the engine is due for an oil change, there may be an oil leak somewhere. At times, the oil level may be higher due to the mixture of water or gasoline. Such an abnormal condition might indicate a problem with the engine itself, necessitating an inspection and repair by a Yamaha dealer.

Engine Oil Leak Inspection

Visually inspect the cylinders, crankcase, and oil hoses for any leakage. It is best to make a habit of checking around the engine, such as when washing the motorcycle. This can be performed even before the motorcycle is due for an annual inspection. If you discover an engine oil leak, refrain from riding, and contact your Yamaha dealer.

Engine Oil Change

When the motorcycle is new, the internal parts of the engine are undergoing a break-in period, creating a large amount of metal particles such as burrs. Therefore, for all models, the first oil change is due at 1,000 km (600 mi) or 1 month of use. Because the intervals for the second and subsequent oil changes vary by model, refer to the owner's manual for the respective model. The owner's manual also gives instructions on how to change the engine oil and the engine oil quantity.

Oil Filter Replacement

An engine is provided with an oil filter to filter engine oil. Because the oil filter becomes dirty after continued use, it must be replaced regularly. As with the engine oil, the first replacement for all models is 1,000 km (600 mi) or 1 month of use. Because the intervals for the second and subsequent oil filter replacements vary by model, refer to the owner's manual for the respective model.
As with engine oil, the replacement intervals for oil filters are indicated by travel distance and time. Generally speaking, an oil filter should be replaced once every two engine oil changes.

Table of Items to Regularly Inspect

Refer to the applicable service manual for the inspection and maintenance procedures.

General Periodic Maintenance
Engine oil Change (warm engine before draining).
Engine oil filter cartridge Replace.

Problems and Counter-measures

Engine Oil Leaks

The engine could leak oil if it is damaged as a result of an accident or a fall, or has a deteriorated gasket. The position of the oil leak is easy to locate if there is physical damage. The leak can be repaired by replacing the damaged part. However, if a gasket has deteriorated, an engine oil leak would take place in the form of a small seepage, which makes it difficult to locate. Engine oil leaks caused by a deteriorated gasket occur in areas where parts connect, such as around the oil pump, oil filter cover, the base of the oil cooler hose, and the crankcase seam. If you discover an engine oil leak, the only remedy is to replace the affected gasket in the area. Otherwise, if the engine runs out of oil, it will be unable to continue its internal lubrication, resulting in engine seizure.

Emulsification of Engine Oil

When a large amount of moisture enters the engine, it will adversely affect the function of the engine oil. Even if the engine is sealed, the air that is introduced through the air filter case contains moisture. As a result of a chemical reaction that occurs during the combustion of the air-fuel mixture, the creation of water through this moisture is unavoidable. If the amount of moisture is small, the rust-prevention agent and the detergent would prevent the performance of the engine oil from being affected. However, if a large amount of water enters the engine, such as due to submersion, it will exceed the capacity that can be handled by the additives. The engine oil will degrade, turn milky, and lose its functionality. After the oil loses its functionality, the engine will be unable to continue its internal lubrication, resulting in engine seizure.
Once the engine oil has degraded, it cannot revert to its original state. Therefore, if the engine oil has become emulsified, it must be changed immediately regardless of the oil change intervals indicated in the owner's manual. The color of the engine oil can be checked on the oil level gauge. If the motorcycle is exposed to rain, it is best to check the oil on a daily basis.

Frequently Asked Questions

[ Questions Regarding the Use of Engine Oil ]

Q1: Is there an expiration date for engine oil?

A1: In an unopened bottle, the composition of engine oil will not suffer any degradation. Even though the performance of unopened engine oil may be maintained semi-permanently, it does not mean that the engine oil can keep up with the evolution of motorcycles or the updating of engine oil standards. Once opened, moisture and dust can enter and the engine oil can become oxidized. Thus, it is best to buy just the amount that you need for each oil change.

Q2: Is it all right to use automobile engine oil for a motorcycle?

A2: Do not use it. Some types of automobile engine oil may contain friction reduction additives, which may cause the clutch or the starter clutch to slip. Moreover, the viscosity and shear stability of automobile and motorcycle engine oils differ.
Thus, the wrong type of oil would prevent the motorcycle from putting its performance into full play. Therefore, use an engine oil that has been developed exclusively for motorcycle use.

Q3: Is it all right to mix different brands of oil?

A3: Avoid it as much as possible because it can result in low performance or malfunctions. Engine oil is blended with the proper balance of various components. Mixing engine oils of different viscosity or quality can lower performance or cause the components to precipitate. However, the slight amount of mixture that occurs during an oil change is acceptable. To change to a completely different brand of engine oil, cleaning the engine once by flushing it is recommended.

[ Questions Regarding Maintenance ]

Q4: Can I change the engine oil myself?

A4: Yes, you can. Refer to your owner's manual for instructions on how to change the oil. Be sure to properly dispose of the waste oil after performing an oil change. If you are unable to properly dispose of the waste oil, have the engine oil changed by a Yamaha dealer.

Q5: What is the approximate timing for changing the oil?

A5: On a new motorcycle, change the oil after 1,000 km (600 mi) or 1 month of use. The second and subsequent oil changes vary by model, so refer to the owner's manual. If you ride the motorcycle for a long period of time without changing the oil, contaminants can get stuck in the engine. Once they are stuck, they cannot be loosened by the detergency of the engine oil alone, no matter how many times you change the oil. If contaminants get stuck in the oil passages, the engine will be unable to perform normal lubrication. Beware that the engine oil will deteriorate over time even when the motorcycle is not ridden.

Q6: Is it better to flush the engine during an oil change?

A6: Yes, it is recommended. Due to the complex internal construction of the engine, some of the old oil will invariably remain somewhere in the engine. Therefore, flushing the inside of the engine to completely rid it of the old oil can help extend the life of the engine. However, even though some detergent components of the engine oil remain, it is unnecessary to flush the engine each time if you follow the oil change intervals specified in the owner's manual. If you did not change the engine oil for a long period of time, contaminants will have accumulated in the engine. In this case, flushing the engine would be very effective.