Sorry to spoil the party folks
I am not able to get any bigger pilot jets than 15 here in Bangalore(curse curse)..
But why should the main jet be changed to a bigger one - thought popping would mostly be cos of the lean pilot circuit?
Last resort of mine is to try raising the needle a notch. What say?
I've done a lot of dialing in back & forth & up & down & sideways on the BS-29 on my '08 after replacing the muffler, putting on a K&N & removing ALL the emissions stuff, ALL. First off, I'm still under 500 miles so I still can't truly dial it in yet, but I've done the best I can. I've done it mostly by adding (& subtracting) needle height shims & 'sparamenting with the mixture screw.
One time I went one shim too high PLUS I tried a 17.5 Pilot. It was AWFUL (from the previous experiment). So I removed TWO shims & put the stock 15 Pilot back in & now it runs the best it ever has; no deceleration popping or any other unidentifiable lurches or glurches. One or two kicks anytime & it's running. Idles like a watch with a thump
My needle has never been anywhere near the Main Jet yet so it will be a while before I discover if it's OK with the stock 110. I'm betting it will probably be OK.
In summary, the engine is happy, after changing intake & exhaust, with only raising the needle height. Try raising your needle by one notch & if that's too high, go back to your original notch & go up one shim. (My notches are not useable. I have to use shims).