I know this subject has probably been covered in the past but I'm looking for specifics - not just an overall best for a range of bikes. I did a quick search but couldn't find anything specific so... I've been using OEM filters in the past but have been looking at trying HIFLOFILTRO or K&N for a change. Would anyone recommend against this - should I stick to the OEM filter or is there a better option? Oil is also another touchy subject around here I see. For an 06 CBR1KRR though, what would you recommend as a good all round oil. Motul seem to be fairly popular. The bike isn't being used on the track (if it matters at all) so I just need a good oil for everyday street use. Any advice/suggestions would be greatly appreciated. Thank you.