I have the Yamaha Touring screen on my FZ1S Fazer and it works fine for me at 5'9". Keeps the wind/wet off my hands too which is great in Spring/Autumn.
Could be a bit taller though as I have to duck my head to clear the visor but I would not change it for another model

Assuming you mean your old FZS600 (pre-2003 model) had adjustable forks.
The FZ6 (2004 onwards) model has different forks on them (43mm diameter as opposed to the 41mm on the older FZS model).
As far as I am aware these are no interchangable.

will a FZ1 S Seat fit a FZ1 N   Anyone know

Yes, same seat. Well it did fit my FZ1S anyway

I was going to ask the same thing about any feedback on the PR3's.
I have BT021's on my Gen2 and they have been "ok", although noisy. Loads of tread left on them but now on 2nd puncture to the rear and have a puncture on the front aswell...bugger.
I tried the PR1's on my old FZS600 and I have to say I did not like them. Took me ages to scrub in and did not feel secure on the front.
I was looking at BT023, Roadsmarts/2 or PR3s as my next tyre for the Gen2. Normally a big Bridgstone fan but the 021's have put me off a bit 

Hated the CBF1000 when I last test rode one. Won't buy another Honda.
Love the Speed and Street triples but no wind protection and as I am "maturing" I can't do naked (in more ways than one).
Had a thought that the Tiger would be ideal. Not bothered about screen noise/buffing as I get that on any bike its more the ride/handling. I really like both my FZ1 and FZ6 and ideally I will keep the FZ1. The FZ6 is "almost" the perfect bike but it does not inspire me to ride it and I have never liked smaller engined revvy bikes (the FZS600 was the same for me aswell).

Looking to replace either my Gen 2 or FZ6 (just for a change) but struggling to think of what to get as I have done most bikes.
I have wanted to buy a Triumph for years but have never bothered as my local dealer is sh*te, but have thought why let that put me off. Been thinking about getting the road version of the Triumph Tiger 800.
Never had an "adventure" style bike so don't know wht to expect. Anyone any experience with them? What they like (positive/negative comments appreciated)

Heat, WD40, Molegrips, impact driver.........although not neccessarily in that order 
Fazeriders suggestions are however more concise and ultimately may be the best options. If in doubt and you have failed miserably, take the wheel to your local dealer or even someone like Kwik Fit (I have done this in the past for a similar issue)

Never bothered with the headlight mod myself as the one headlight puts out a more than decent beam. Not quite as good as my Gen 2 or MkII FZS600 but its more than decent.
Only thing that annoys me is I keep getting flashed and gestured at (by cars and bikes) advising me that I have a headlight out..........I fecking know!!!! 

I did come from a Gen 1 and did wonder what they did to the engine....ruined it....but thats progress for you 
Lets be honest though, most of the Jap manufactorers have gone down the "high reving" route from an engine perspective (taking the twins out of the equation of course). This is of course a cost saving exercise and ultimately nothing to do with what we, as consumers want. Gone are the days of both bike and car manufacturers actually listening to what their customers want.
 

I agree with your comments Pitternator but my issue is I'm not into modding bikes for performance. I use my bikes as "tools" so any mods I make are generally for practical reasons (screens, racks, air fresheners etc).
Riding my last stock Gen 1 back to back with my stock Gen2, the Gen 1 felt "old" even with the low unabused miles it had on it. Technology/mechanics have changed and moved on since the Gen 1 (IMO  ) and that is not dissing the Gen 1 in any way. Track day riding or serious road riding are another matter and being honest there are not many "sorted" bikes out there that you would not have to modify in some way (unless you buy an italian plastic rocket)
Yes you are right, chuck some money at the Gen 1, upgrade the suspension and Ivanise the beastie and you will have a lovely machine that will be a "classic" in years to come....but you really do need to do these things. Gen 2's issue (apart from the bloody awful seat) is power delivery. My Gen 2 could do with a PC3 but I personally just ride around the issue. If I did not find it so temperemental on cold/wet roads I would ride it all year round. Builds character though 
One thing is however correct....the build quality (and looks) on the Gen 2 is excellent. Puts Honda completely to shame.
Quality of the Gen 1 is excellent aswell and I rode all 3 of mine through winters without any issues.

Again I would emphasise that tyre recommendation is pure opinion.
Slaninar is correct that tyres don't neccessarily need to be the same type but all tyre manufactorers (and some insurance companies) advise not to mix brands.
Why........the profile and compound differs between different brands. While on actual geometry is not an issue (like on a car where tyres should be the same type on an axle) footprint and behaviour is a factor. I know that when I fitted Avon tyres the steering slowed considerable on the bike whereas I find with Michelin's the turn in is faster.
Would I want a different brand front/rear....not for me but each to their own 

As Nooj as just pointed out are you sitting straight on the bike. My mate had the same issue with his Blade and after I followed him for a while he was sitting off centre. The cause was him sitting squint and unconsiously putting pressure on one of the handlebars to compensate.