Switched the idle jet from a number 45 down to a number 42. As I think it was too rich at idle. When I removed the carb, I also found a tear in the rubber hose for the PAIR system to the carb isolator. Luckily it was right on the end, so I cut the end and shortened the hose a little. This is a cold start idle (why it stumbles a little) with the idle mixture screw 1 1/4 turns out. The bike has a normal air filter, but a full Delkevic stainless exhaust (hence not using stock jets).

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