GPX and GSX - both parallel twin engines.
GPX = 140kg
GSX = 180kg
GPX is still in production using 15 year old technology
GSX is no longer in production used 20 year old technology
These are the titbits of info I picked up during weeks of searching before I bought a VTR 250.
It's getting harder to find fast 250s now because the worldwide 250 market is not lucerative for bike manufacturers any more - Japan has power restrictions and in Australia you can ride bigger engined bikes. In most of Europe the 125cc is the learner limit too. New Zealand is just too little to have any impact.
In space, no one can smell your fart.
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