slightly missing

2010 ST 1300a 25000 miles. Just got new tires. K&N Air filter. Aftermarket Cruse control.

Problem I noticed this weekend:

the bike is missing slightly and dying when I pull the clutch in at low rpm.
but my thoughts are as follows:

Dirty air filter not likely, just put it in last year, but will check. checked and it was clean
Vacuum air leak?
Going to replace the check valve for the Cruse control, I removed it last year.
Idle is ruff and rather low at 700 rpm, looked for the knob to adjust, will find when I pull the plastic.

Thanks for the help.

Plugs? If the gap has enlarged from erosion the spark can blow out under compression.

Good Ridin'
slmjim

The idle adjustment knob is accessible on right side of bike above valve cover - a little black plastic knob with a screwdriver slot recessed in it. No need to remove the fairing unless the cable housing is seized where it is threaded into the throttle body frame.

Mine was doing this and would stall following some suspicious gas. My ST had a slight cough below 2,000 RPM. Cleaned the 5 way T this winter, replaced the vacuum hoses with 3mm silicon hoses, and all is right again. Got the hose from Amazon following a goggle search for 3mm silicon vacuum hose. Didn't even have to adjust the idle. I've put 600 miles on since the fix.