do i need more fuel with just a slip on and k&n

throw out the K&N, get BMC or DNA instead
and yes get a pcIII, also get a custom map

Thanks for the reply. Is it a must have? I'am not looking to get every last horsepower out of it , I just thought it might be a bit lean and dont want it to pop because I beat on it pretty hard.

a pcIII is a must for almost any 1000rr with or without mods

the bike runs ridiculously rich on factory settings so even a pcIII with a base map will make it run better ... and smooth out the power-band in some cases

A powercommander is my next mod, already have the slip and BMC's, flapper and pair.

I agree. The power commander makes the bike MUCH smoother.
Its not about every last horsepower,its about the smoothness and power gains over the whole band.In turn making the bike run better.

With a yoshi slip on and k&ns'(was on the bike when i got it),best it would muster was 35mpg,installed a PCIII and one of the custom maps on the map list,bike runs better and knocks down a LOT better MPG(usually dont see the low fuel light till 150+)..

krazwag said:

Thanks for the reply. Is it a must have? I'am not looking to get every last horsepower out of it , I just thought it might be a bit lean and dont want it to pop because I beat on it pretty hard.

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The only "must" is must throw out the k&n.

I just opened up the air box on my 07 600RR which was serviced at the beginning of last season. 6000 miles of street and track including riding like a mad man through a brutal thunderstorm down a road that ended up in a CBR and R1 mud bog. That air box of mine was so frickin clean the virgin mary herself would have eat off it. I had it off the bike last season thoroughly vacuumed out and armour all. It practically looked like it was done yesterday, nice and glossy with not one hint of dust or debris anywhere.

man I did;nt realize k&n sucked that bad

go with bmc ditch the k+n. :noob:

krazwag said:

man I did;nt realize k&n sucked that bad

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The airbox doesn't even close correctly with K&N filters as you probably noticed when you installed it. That's just unexceptable.

mugen91504 said:

The airbox doesn't even close correctly with K&N filters as you probably noticed when you installed it. That's just unexceptable.

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Mine came with k&n's ,ive had the box off many times and it fits fine.

Some of the older k&n's didnt fit right but the newer ones seem to be spot on.
I dont disagree the bmcs are better made. But i rather spend my money somewhere else ,2hp,less filtration and half a pound of weight is not worth it to me..

Plus even if i did BMC, i would run the street filter which has more filtration which equals about the flow of the K&N or stock filter anyway..

The K&N motorcycle filters typically filter worse than factory, and don't provide any appreciable (measurable) horsepower increase. The BMC Race filters will typically give you a couple hp across the powerband, at the cost of a lot more debris.

These days, it's not worth replacing the air filter with anything except new OEM filters every 10k or so - unless you're OK with oil changes every 1000mi.

In response to the OP's question, no you do not need any fuel correction to be "safe", but you would benefit from it.