with the #45 pilot installed my bike will run with fuel screw turned all in; i questioned jd about this, they told me to set it at 1 turn out; for the money, i thought they should supply a few more pilot options; my kit came with #55 leak jet,
Yeah, I find it strange that I am at Sea level with a Leo Vince slip on, and with a 175 main and 45 pilot I am running rich. From most of the posts that I have read, people are running 180 mains and 45 pilots. I think I do have the 60 leak jet in it (only because it sounds familiar), but something else tells me there was no hole (plug) in the location that is supposed to be the leak jet. I am going to replace the fuel scew today and verify that I have all of the parts in the correct orientation. If I can get a 42 pilot, I may try that. I may even try a smaller main, although it seems to go against all of the posts I have read.
I don't see anything in the behavior that you've posted that would lead me to believe that your main jet is too rich. I see no reason to change it...
The plug color being very black and sooty leads me to believe I am rich. I am not going to mess with the main, but I did put a 42 pilot in and will see how that affects things.
When I had the FCR on my 610 I found the 42 pilot to be too lean, but had the same issue that you are having with the 45 pilot. I went back and forth like a dog chasing it's tail. Same story with my TE450, it liked a 45 pilot too. .
I get tons of decel popping with the 45 Pilot... 2.5 turns out on the mixture screw I believe. Leo Vince Slip-On...
I haven't done more than a couple miles, but so far indications are good. 175 main 42 pilot 3rd clip on JD red needle Fuel screw 1.5 turns out TPS plugged in iridium plug
After a couple of days of riding, I have found that magic step that so many people have posted about where the 1/4 throttle surge/hiccup/stutter has nearly completely gone away. The last change did it: 45 to 42 pilot and needle down to third clip (or clip up to third groove). All other changes prior to this had no positive result. So based on that information, I am lead to believe that the 1/4 throttle range was just a bit rich for all of the variable that seem to come together at that point. It is certainly possible that timing, air flow, exhaust back pressure, etc can affect it. I still find it odd that so many people have cured this condition with so many different solutions. I am not certain which of the two changes had the most effect, and I may change one of them back to see. Oddly enough (and to confirm what blueknob stated) even with the 42 pilot, I can turn the fuel screw all of the way in and it still runs relatively fine. I do get some decel popping and the power seems to be smoothed out in the low range. It seems like there is slightly less punch, but that seems easily cured by twisting the throttle just a little further. I actually prefer the manners with it tuned like this. It seems easier to ride smoothly and more restrained on my commute to work. I may even save a bit of fuel.
