02 VFR troubleshoot

I own a 02 VFR, 14000 miles, great shape. Just recently lost power while riding. Almost feels like a cylinder is out. It will run but just feels very sluggish. Bike is very slow of the start and engine note is off. New plugs have been installed and has not helped. Any ideas where to start?

 

Is the FI light on? If so then perform test procedure for what it is indicating. If not then Check battery, wiring, RR.

 

If you suspect a non-working cylinder, find which one and proceed from there.

 

check spark, individually
check fuel pressure - maybe fuel filter is fouled
check air intake filter

 

If it is a dead hole one pipe is going to be much colder than the rest, easiest to check in my opinion.