compatibility

Hey all, My caliper is playing about, leaving marks on the old and brand new disc :( So I thought I'd buy a second hand caliper and make sure it's all working before fitting - I ride every day and can't afford too much time off the road. So just wondering, I've seen plenty of pre 2005 calipers...

Sorry gents, need info asap... Will 2005 forks fit a 1998 wheel/rim? (Im looking at buying 05 for my 98) AND is the upper triple the same on ALL models (just the ignition system different i.e. short/long keys) or are carb&fi different? Much appreciation in advance!