* SAE 10W-40: This is the recommended oil viscosity for most Honda motorcycles, including the 2006 CBR. It provides good protection for the engine and transmission, and it is not too thick or too thin for the front seals.
* Synthetic oil: Synthetic oils are more expensive than conventional oils, but they offer better protection for the engine and transmission. They also resist thermal breakdown better, which means they will not thin out as much as conventional oils when the engine is hot.
* Honda GN4 oil: This is Honda's own brand of motorcycle oil, and it is specifically designed for Honda motorcycles. It meets all of the requirements of the 2006 CBR's owner's manual.
Additional tips for protecting the front seals on a Honda 2006 CBR:
* Check the oil level regularly and add oil as needed. Low oil levels can cause the front seals to leak.
* Do not overfill the oil tank. Overfilling the oil tank can put pressure on the front seals and cause them to leak.
* Use a high-quality oil filter. A good oil filter will help to remove contaminants from the oil that could damage the front seals.
* Avoid riding the motorcycle in extreme weather conditions. Extreme cold or heat can damage the front seals.
* If you suspect that the front seals are leaking, have the motorcycle inspected by a qualified mechanic.
