The place to come to share your technical expertise, or just find out what the little springy thing is that's just pinged out of sight under the work-bench.
Not 100% sure if this mod is relevant to the FZR1000R/Ru, but the fuel caps on the FJ & FZRs are the same, so it may well be that this mod will aid fuel flow where it matters at full throttle
Scroll down to the lower section of the link & you'll see the suggested mod. It might be worth doing, so i'll have a try with the spare that I have & see if it works on my FZR-R
Bike's still being rebuilt after a lengthy refurb.
I've got this mod & the 4 degree ignition advance one to do after i've ridden the bike as standard. Once I know how it goes i'll do the mods one at a time, then i'll be able to say if they've been worthwhile....or not, as the case may be