My f4i is bogging below 5k rpms...I hate it and want to fix it. I thought it might be spark plugs, so I replaced them few days ago, no much change.

Here's what I found out yesterday, I checked the coils while the bike was idling, when I disconnected cylinder 1 or 3 the bike would die, when i disconnected 2 or 4 nothing happened...? is this normal?

I switched the coil packs around and got the same results - no detonation at cylinders 2 and 4 at idle...?