When checking if it has a K&N air filter fitted, that there is not any excess amount of oil on it,
K&N air filters are designed to be oiled. The oil helps to trap dirt and particles, enhancing the filter's performance. When using a K&N filter, it is essential to apply the appropriate amount of oil after cleaning to maintain its effectiveness.
If it's an OEM paper air filter ignore above.My r1200 Gsa had a K&N air filter that had far too much oil put on it, and leaked from air intake box covering the lower half of my engine, swapped it for an OEM paper filter. No differences in output.
