what are the typical size jets a dealer would put in when doing a stage 1, i think i need a rejet since i put the hookers on,i went to the dealer and they wouldnt tell me what size they used..any ideas? if i find out i will just go back to the dealer and buy the jets for a few bucks a piece.

 

Before you jump into swapping jets, how does the bike run? Do you have an increase in decel popping? How about at WOT?

Your A/F ratio is going to be influenced more so by your A/C than a pipe change.

 

If you want to buy a selection, without knowing what you already have, I suggest:
Pilot - #45, #46 & #48
Main - #180 & #185

For 04-06 1200's, the most common combination that works for most people seems to be a #45 & #180, but each bike is different.

 

thanks charley, i am having alot of decel pop..i changed the exhaust gaskets and now they are not leaking(which they were before the change) but it still does it..so you think it might be the air/fuel mixture? and if so what is the proper way to adjust it? in less air,out more air?

 

What do the plugs look like¿

 

For the time being I would leave the Main jet alone. Increase the Pilot jet size one step and then readjust the mixture screw. If it makes it better but doesn't cure it, go up one more size on the Pilot and readjust.

 

Correct me if I am wrong anyone, but if I remember my highschool days of automotives, when you change out your pipes, and add an air cleaner kit, you allow more air to pass threw the moter, so you create a lean condition. So that means you need to add more fuel to even things out. The larger the jet size, the more fuel that is added.

 

You're correct. That's why I suggested he increase the size of the Pilot jet. However, he only changed the pipes so the change in jet size should not be dramatic. The Main jet only comes into play between 3/4 - WOT.
The stock Pilot jet is a #42.

 

yep. I had a 42 in mine, but they changed it because I was getting a backfire on start off and changed it to a 45.

 

Anytime you change one thing in the intake/spark/exhaust cycle, you have to balance that with adjustments somewhere else in the cycle. I would suggest you adjust your idle mixture first. It's the easiest/cheapest thing and may have a significant benefit. There are numerous sites with instructions. Before you begin tho, use an inspection mirror to find the little tower that houses the idle mixture screw on the bottom of the carb. See if the plug is still there; if you can see the slot for the screw, you won't need to remove the carb from the bike.


'05 XL1200R