So just as the title says whats the life of a k&n filter if its cleaned every so often? I was working on the engine last week and noticed a big differnce when I started the bike up cold when the breather was off compared to being on, it idled right away instead of me haveing to hold the enrichener out and throttling a bit , is this an indication it is time for a new filter? I had just cleaned the filter with the k&n cleaning kit a couple days before.