what is the best and smallest Air filter for the fireblade carbs. model, approx. price and where to get it. Does the carbs. have to be re-jetted? david

David,

Try this thread http://forum.locostbuilders.co.uk/xmb/viewthread.php?tid=4412

Although Jasper was looking for a filter for a ZX9 the same filter he ended up with (and me too) can fit anything using the blank backing plate (you cut the holes yourself).

It will definately fit a blade ('cause that's what I've fitted on) although you may need a rejet of the carbs as the air filter will make it all run too lean. You'll need bigger jets to get more fuel in. Less fuel ecomony but more power.