Whilst embarking on my never ending quest for my favourite jetting setup! i have been using the oe yamaha filter and a crd filter,i found that cleaning 1 filter at a time was a bit pointless so i thought i would invest in a 3rd filter,i tried to get a different brand for the third one from the supplier that i get some of my parts from,a crd was all he had so i thought ok the crd filtter i have already was ok,but when it arrived i could see it was smaller than the other crd filter i have?,when i ran the bike with it in it did not feel good at all (and there is quite a difference in size when i put it back to back with the yamaha filter!)i had to drop my needle a full clip with this new crd filter compared to the oe filter i just took out of the bike (scary!).So i thought i would ask you folks what you recomend for a good replacement filter,and a brand which is consistent in what they produce,for any one who reads this and is getting a little bit confused when trying jetting changes keep track of which filter you are running at the time,i am going to try my oem filter back in the bike without touching anything else to see what goes on?.Any help with a good make of filter and where to buy would be sound(now i think i know why those filters were on special offer DOH!).