I put the BellaCorse thumbscrews back in yesterday.
Bought a Dremel on sale at Lowes and increased the size of my airbox hole and opened up the bottom of my K&N all the way. Cleaned and lightly oiled the K&N. Bought a new pair of NGK's and side-gapped them. Re-synched the carbs. Put two shims back on the stock needles. None of this should matter much, but what the hey.
I was very careful to ensure the idle mixture screw o-ring was actually fitted to the screw just before the taper. I may have just dropped it over the taper on the original install.
At about 3/4 - 1 turn out, I'm happy and leaving the thumbscrews in. I also put about 100 miles on today and the dyna-mo-pants was happy. No back fires, and very light slight popping on decel.
Fo what it's worth, my setup with thumbscrews:
- AI Removed
- Hole in bottom of airbox all the way to "nubs"
- Bottom of K&N airbox removed
- Snorkel removed
- TOR longs (sounding pretty good actually at 6000 miles)
- 132 Mains
- Stock (142) pilots
- 2 shims (home depot brass variety) on stock needles
- BellaCorse thumbscrews
- Stock NGK's side-gapped
