k&n are they worth it?

[unfazed]

The filter in the photograph is age and petrol fumes discoloured making it look worse than it actually is, therefore having little effect on the running. A bad filter will only effect the running at 10 to 13000 revs and then get progressively worse lower down the rev range as the filter continues to get dirtier.  :eek
If you do not regularly use the bike above 10000 revs then the difference in the filter you had and a new one would not be really noticeable. :rolleyes

However what you would notice with the K&N is a slightly better throttle response throughout the rev range and a little less vibration. If you do not notice these changes then you most likely do not rev much above its 7000 power band :pokefun