Oil Filter Options

[Cormanus]

Tev62, respectfully, it is an assumption on your part that the four friends tightened their K&N filters with the nut. If so, they may have deserved what they got. I can say that the one K&N failure that I witnessed was on the bike of a person who would not and did not make such a mistake. The product was faulty. I've no idea whether that is a common occurrence with filters of that design—I'd be surprised as K&N have been in business for a while—but it does seem to me obvious that the K&N filter, even installed properly, contains a possible point of failure that the OEM design simply does not.

In truth, I have no idea whether K&N filters are safe or not. Having seen one fail and spray oil over the muffler and the rear tyre, I will not willingly install one on my bike.