Here are the results of my testing....
First of all, even though most of this info doesn't enter into the equation, here is how my bike is set up.
130 mains
Stock pilots
TBS needles
AI out
Snorkel out
1 3/4" hole drilled in airbox and stock filter
Thunderbike pipes
I removed the HD pilot screws and installed the new tscrew pilot screws at 2 turns out. Started and ran fine - popped and banged like crazy on decel. 2 1/2 turns out to 4 turns out - did the same. It got slightly better at 4 turns, but not much.
I removed the new tscrew pilot screws and installed the stock screws. Exactly the same results.
I removed the stock pilot screws and reinstalled the HD tscrews. 1 turn out. No popping at all. A pleasant rumbling on decel.
I adjusted the HD screws in and out. They made no difference in the idle until nearly bottomed out, and again it was negligible..
I left them at 1 turn out and put 100 or so miles on today - bike ran fine.
I think it's probably slightly rich at idle. I haven't checked the plugs yet. Based on all the info I've gleaned from this site, I would imagine that reducing the airflow or possibly going with a larger pilot jet would let me use the stock pilot screw again and tune out the decel popping.
I realize having a dyno to test all this on would answer all the questions, but I don't have that luxury.
Until I get the tinkerbug again, I'll stick with this setup.
If I'm all wet here, throw me a towel....
Talk amongst yourselves.......
