Got a pretty consistent and powerful backfire or 'pop' on choked cold startup. No other time but starting. Currently running pod filters, 160 mains, stock pilots, 1 shim, 3 turns out and Specialty Spares short slashes. Runs like a bat outta you-know-where, but the backfire's a bit annoying. I've checked the couplers and condoms...any other suggestions?
