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I am currently getting some accesories put on my 99 for looks at the moment, but along with that comes some small performance mods.

My question is...I currently have a ackropovic slip-on and am planning for new spark plugs and a new K & N air filter. After thats installed, I know I will have to re-jet. Last season, I had 2 flat spot during my rpm range so I am hoping they are cured after a dyno run and re-jetting. Do you guys think that this will be ok mods and should the re-jetting fix those flat spots I have?

Also I was wondering what brand of plugs u guys prefer and if any other filters than K & N you guys prefer?

thx
 

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i'v read some excellent writeups on BMC Air Filters, very good build quality, rejetting will get rid of some of the flat spots, but wont be perfect without a full system and engine work.
 

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for plugs id go with ngk the filter I would keep stock unless yours is bad and getting it tuned should get rid of the flat spots for you
 

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I also have a 99. Even with a jet kit I still had the dead spot from 4-6k rpm. I've done a few things other to help this. I run the cooler of the two plugs recommended, I run only 89 octane fuel and the single most helpful thing, got a Flo-commander. Took away the dead spot 99%. Try those things too. :cheers
 
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