I'm thinking of getting one because I hear they help. I already took my airbox lid off. However, looking at my stock filter it looks like a fine piece of foam. Does aftermarkets like uni or twin air really get that much better airflow? Also which seems to be better?

 

Idk... I whent with a K&N, only because I already had massive amounts of K&N cleaner and oil.

 

i like the k&n with kdx snorkel combination...uni with no snorkel combination seems to work fine too...i was bit worried about riding in the rain with no snorkel...

 

I never had issues riding in the rain with my stock filter and no snorkel. Haven't really got caught in any heavy rain with no lid thus far so I cant say there

 

Worried about riding in the rain with no snorkel? Iv'e been looking at how air gets into the air box and it looks pretty restricted. It looks like most of the air the air box gets is coming off the radiators. Try taping a small piece of paper on top of the air box lid and then go for a ride in the rain. Don't miss any puddles. If water got up there,you'll know.Cheap, easy, effective and foolproof.

 

What type of riding do you primarily do?

 

Primarily street. Very hilly around here so I get good use out of the full rpm range.

 

Then the K&N is the way to go. Better air flow over stock and will last the life of the bike if cleaned and oiled.

 

In purely financial terms a good quality washable air filter will save you money over the life of a bike (or car) when compared to the cost of replacing the paper filers every xKM or yhours, not to mention having cleaner air and thus less wear and tear on the engine. In performance terms it's hard to say. A K&N will flow more air than a paper filter, but if the original wasn't restricting the motor then you won't gain anything.
Over all I personally think it's worth doing, but ultimately it's up to you.

 

I had the K & N.. it wasnt a perfect fit,but it twisted enough to get it in..it added the tiniest bit of noise,nothing to worry about. very un-restrictive filter.