The bike pictured above is Gas Gas’ offering for 2010. This one is the ‘heavy’ 300 weighing in at 68Kg, you can get a spritely 250 for 66Kg or a 280 which seems to be the popular choice.
Mine’s a 350 2 smoker, like this one below (all the way from 1995
):

“The 1995 model year saw the continuation of the dominance of Jordi Tarres in the Trial world championship races. The new 327cc JT35 model was introduced after extensive development in the hands of top GASGAS rider Joan Pons. The new case-reed-valve 327cc engine was without question the most powerful trial motorcycle produced by any manufacturer to date. In the hands of competent riders, GASGAS continued to win championships at all levels in many countries across the globe”.