Join Date: Apr 2002
Location: Terrible Hole, IN
As far as comfort, the F4 is WAY better than any of the F4i's. My guess is it's because of the single seat design. The F4 is the bike I (and my wife as well) learned to ride on. It was very forgiving to a beginner but also had plenty of get-up-and-go once the beginner stage is past. With three years under your belt I think you would absolutely love this bike. When my wife started riding the F4 I had an XX, but after riding the XX I realized I had more fun on the F4. It was just a great all around bike. Good for long rides, very fun in the twisty stuff, and even hit the giggle button quite often in the straights.
The only problem I know of with them is the Cam Chain Tensioner's (CCT) seem to go bad, but that is pretty common with CBR's from what I gather in my reading. After three years ours was starting to go out but the bike was stolen before we could get it fixed. Other than that the thing was bulletproof and never gave us any trouble.
Unfortunately I don't have any experience with the ZX6, other than personal fit. None of the Ninja's fit me very well, but the F4 fit like a glove. I'm 6'2" though, so if you're shorter I would imagine both will fit well. Then it becomes pretty much personal choice.
The God of the Old Testament is arguably the most unpleasant character in all of fiction: jealous and proud of it; a petty, unjust, unforgiving control-freak; a vindictive, bloodthirsty ethnic cleanser; a misogynistic, homophobic, racist, infanticidal, genocidal, filicidal, pestilential, megalomanical, sadomasochistic, capriciously malevolent bully. - Richard Dawkins, The God Delusion