Hi all

new to riding the CBR600f 4i and ive noticed that on low revs / setting off its a bit splutery when setting off ( done oil , oil filter , coolant and all brake pads ) been reading up that it can be FPR or plugs and i want to fit iridium plugs but cant seem fo find the correct plug numbers for the NGK plugs before i go in and replace them and the air filter but main ones that come up after alot of searching is the IMR9C-9H

 

Not likely plugs as when they go bad, it's always under difficult conditions, WOT @ high-rpms.
You've got some other issues: vacuum leak, TPS, MAP, ECT, etc.

 

have to bring it in to the garage and get the plastics off and check things over , not getting any flashing of the F1 light so possibly a cracked/worn vac pipe