Hi wonder if some one can give me some advice

im having a service done on my zed and wonder if its worth changing the standard air filter for a performance one will it make any real difference and how often do these performance filters need changing?

 

Most replace the whole air box with a cone K&N style filter. Makes ahealthy increase in bhp. I can't say what effect replacing the std filters would have. But it would have some. I would try and replace the whole air box if poss - its the best route for bhp.

A couple of years back I replaced my grubby Nissan filters with K&N ones and whilst I noticed no performace difference (and neither did I try to measure any) what I did notice was a small improvement in fuel economy (about 5%). Of course, this could have been due to the fact that the old filters were filthy.