What size slow jet needed for 2005 XL1200?

I have a 2005 XL1200R Sportster, with Rush aftermarket exhaust, and a K&N air filter (in the stock filter housing). Once adding the K&N air filter, I could tell there is a bit of hesitation when starting to roll on the throttle, and strong gas smell on hot days, so I would like to re-jet the carb. I will be replacing the velocity needle, but also think I should go ahead and replace the slow jet as well. The problem is that I have no idea what size slow jet is in the stock carb (40mm CV carb), and therefore, what size I should also upgrade to. Can anyone recommend which slow jet size to use, please?

Oh yes, I definitely plan to adjust the mixture screw as well. I have already purchased the CVP EZ-Just screw. BTW, would the gas fumes suggest a lean setting (usually occurring on relatively hot days)? Thanks!

You are smelling gas?? I would think that you have too much fuel....(Rich)

That is what I was thinking as well, Johnny. But, all the information regarding the H-D CV carb's usually point out that they run lean from the factory, right (more especially if added aftermarket exhaust and free-flowing filter)? I changed the exhaust to Rush (with baffles), and added a K&N air filter (kept the stock filter housing on, though). I should be able to partially cover the air intake port (on the filter housing) to test it for leanness, right? It ran pretty good until I added the K&N filter. Just the Rush exhaust didn't seem to make a difference, alone. I wonder if the gas smell is due to the main jet, rather than the slow jet. If the case, that should require reducing the main jet size, right?

BTW, I found out from my local H-D dealer that the stock slow jet is a #42 (and #180 main jet). He also stated that they usually replace them with a #45.

What size jets come with the CVP Stage I Carb Tuning Kit for the 04-06 XL1200 set (below)?

Well, it only really smells of gas on pretty hot days, and only noticeable when mounted on it, and stopped / idling of course. I have not really ever let it set for extended periods of time; have even ridden it many times during the winters, and often even closed the petcock and let it run out the fuel in the carb when planning to leave it parked for a while. I'm not sure it is a major issue, as it doesn't smell of anything but the exhaust, of course, when moderate outdoor temperatures exist.

Anyway, I just took it for a spin, after taping shut, about 3/4, of the air intake port...the throttle response is perfect like that (which would definitely mean it is set too lean, right?).

Hey Chuck, can you please elaborate on the vent overflow hose? Where may it be located, what should I check for, and how would I notice a problem with it? Sorry, I do not know much about mechanical details of the bike such as this...have only changed oil/plugs/wheels really. Thanks.

I went ahead and ordered the Basic Stage 1 Tuners Kit. Based on several other recommendations, I will first try replacing the needle and adjusting the idle mixture screw, and see how that goes, possibly also adding the #45 slow jet.

And, God Bless Texas.

Thanks again, Chuck.

Oh, so were you referring to checking to see if it is overflowing when the tank is filled, or check to see if it may be clogged or something?

Will do...thanks a lot!

I changed the pilot jet from 42 to 46. It is running much better now at low rpm's, but it does still smell of gas. There are no gas leaks that I can see. If I was to adjust the idle air mixture screw, would this possibly resolve the problem?

Did you check your float level when you had the bowl off? It could be just slightly out of wack...

I didn't even want to touch the float, based on everything I've read about possibly knocking them out of whack, but it appeared to be in good condition.

I am curious of what you mean by "good condition?" If the float level is off just a touch you can get the symptoms of gas smell because you are putting too much fuel in. Just a thought.

I am going to get those pics to you Cowboy. I am going to post them here as well.

I will try changing the gas cap with a new one, as I smell gas a lot around the cap when close to it. Thanks.