Motorcycle and Scooter appreciation

GSXR750
CBR954
Aprillia Tuono

Depends how mental you wanna go and how much experience you have really.

YZF750R? You could buy a nice one for 4k...

As Chak said it does depend how fast you actually want to go... 600? 750? 1000?
Do you have a marque preference?

Funnily enough I have a list of bikes I want to own at some stage and Chak just listed them all below... specifically:

• 1990 GSXR750 L
  
• CBR954RR Fireblade
  
• Tuono 660
  
  

@Chak it could with a new set of tyres so I'll pitch for something a little bit more enduro-esque! I reckon it'll be getting a new exhaust anyway and possibly a less laid back handlebar but we'll see what he wants to do with it himself!

I really liked my GSXR1000 K3 - you'd never really want to go faster. The K5 is even better but getting a bit pricey as they're so talked up. The K3-4 are the hidden values...sweet handling, civilised, stonking midrange and stupidly fast if you want. First bike I ever took to the South of France.

I know what @jambon will recommend.
Something of that era would be a good.
Depending on how mental you want to go an early R6 would be a good shout I would say. They look amazing and performance is great parts availability is good and they are just so cheap. I saw a ropey one for sale recently for £1000. There were some gearbox complaints but I think it was only a small number compared to how many they sold.

Pretty much what @Jung says, think the GSXR 1000 K5 is generally accepted as the last 'analogue' sports bike. I'd have a think if you want inline 4 (generally Japanese) or V-twin (generally Italian) as they're very different flavours. If you do want to go Italian doesn't have to be too expensive either, late 90s/early 2000s Aprilias are all kinds of awesome.