As I said, they are not "bad bikes" it depends on what you want to use it for. As a commuter bike it would be fine, but if you are looking at using it for run outs at weekends for instance, it would get boring ( personal opionion ).
However, coming from a 125, you may well find it's fine.
I have never riden a GPZ500, but I had a KLE500 for a while as a "hack" bike.
Same engine. I currently ride an Aprilia Mille RSV, and to me ( again, personal opinion ) twins are all about grunt down below and a twin such as the GPZ that has to have the nuts revved off it till things start happening at 7k revs kinda defeats the purpose.
But then again, I've been fed on a diet of large capacity superbikes for a long time now, so perhaps I'm being unfair in this situation, regarding the OP's experience and current ride.
If however, I was looking for a "step up" from a 125 to a first "big bike" I would look at some of the older generation 600 cc bikes.
They wont be particularly more expensive to run and insure and the novelty of your first "big bike" will hold interest for a lot longer than a Kwack 500 twin will.
A couple of examples from a quick search, and yeah, some of these are more than the price mentioned at £750, but set yourself a limit of £1000 and there's quite a few bargains to be had out there:-
Kwack ZZR600's :-
http://search.autotrader.co.uk/es-u...KI&model=ZZR&min_pr=&max_pr=1000&max_mileage=
http://search.autotrader.co.uk/es-u...KI&model=ZZR&min_pr=&max_pr=1000&max_mileage=
Yamaha FZR600 :-
http://search.autotrader.co.uk/es-u...AMAHA&model=&min_pr=&max_pr=1000&max_mileage=
Suzuki Bandit 600 :-
http://search.autotrader.co.uk/es-u...UZUKI&model=&min_pr=&max_pr=1000&max_mileage=
Honda CBR 600 :-
http://search.autotrader.co.uk/es-u...DA&model=CBR&min_pr=&max_pr=1000&max_mileage=
That's just with a quick search on Biketrader. Have a browse through the likes of eBay and some other places like your local papers and the Adtrader and there are loads out there to take your pick from.
I may as I have said, came across a bit "harsh" with my opinion on the GPZ500. If you find one that is mint, low miles and looks genuine, at the right price, it could be a great buy for the OP.
