oops so i have a hmf slip on and i have been trying to get the jetting but i cant seam to get i perfect it just seem like i dont have power going up steap hills .... i went by what dyno jet recommends and it seemed rich i started with a 150 and now i am down to a 144 and still have not noticed any thing am i going to lean should i be going up i am just confused

 

come on please somebody must have a idea now i went down to a 142 and that was definetly lean but the the 146 seamed gut less up hills

 

What else did you do? Airbox? Filter? Needle setting?

 

Did you try running it without re-jetting? If all you did was put on a slip-on and nothing else, you may not need to rejet. If you put a higher flow filter and/or remove the airbox lid or snorkel then you will definately need to rejet. More air + more gas = more power. I'm guessing that with only a slip-on you may not notice a big difference in power. If it doesn't run well in the lower rpms under load but runs good at higher revs under load then I think you might be rich, but if as you say it doesn't do well on the hills then I think you are lean.

 

i am running a open air box i went i am on the 4th clip on the needle the low end power feels good even the mid range but when i am under heavy load and floored it seemes gut less

 

take your air box lid off.if it runs better than you have it rich. i had a k@n ,no air box and i cut the baffle out and i was running 160 main . it didn't feel to bad but i knew it was kind of rich.i have a new cdi and a full comp yoshi now and i'm running a 165 main and half a turn on the air mixer screw and it's running damn good. i think it's right on know.

 

Try running it with the airbox lid on.
I would try a bigger main jet. Somewhere around a 155-160 with an open airbox.

With the stock pipe I removed the airbox lid and installed a 150 mikuni mainjet and it ran great. With the ful pipe I ran a 160.