Bog at low throttle, no low end????

[400exNH]

Guys,
Not sure if this is my jetting or what? My engine is stock, but I have a Pro_Circuit T-4 with a K&N filter with airbox mods. I'm running a 158MJ and a 42 Pilot Jet. My Needle clip is dropped one and my pilot screw is at the stock setting. The bike seems to have NO low end at all. The mid & top end cranks, but the bottom end sucks. Anything I can do to get more low end power. I have a FMF Powerbomb on order, should be arriving Wednesday. I don't want to put on a 14T as I don't want to loose that speed. Any tips?

[Leo]

My T4 had awesome low end power + throttle response... Thing pulled like a bear a very noticeable improvement over stock.. Funny thing is I didn't notice a whole lot of top-end gain :)

Might want to try a 40 pilot or adjusting the pilot screw in a bit, maybe it's a bit fat at the bottom.. I've got a 42 pilot, but I'm roughly 1 1/2 turns out on the pilot screw..

Leo

[lil400exman]

also look at www.thunderproducts.com ufo and dial-a-jet the will help and boost the hp i think 1 1/2 hp per100cc's with both on at least that is what they said!:devil

[400exNH]

Thanks Leo. Yeah I was thinking I was running a bit rich on the bottom end as well. First I'm going to install the Powerbomb, see how she runs then if it's the same, I'll try leaning out the bottom end. Thanks again
Chris

[01_400exrider]

Leo is your a slip on?

[Leo]

was a slip on... it was to loud for 99% of the places I ride, so I wound up trading it for a FMF PC-IVQ (which I like very much, it's much quieter, but it doesn't have the low end grunt of the T4)..

Leo