I am hoping that you are not an american and that the poor spelling and use of the language is just the result of a bad translation program.
Now if I understand your question, you want to know why your bike almost dies when you go from a dead stop to 2nd gear. Are you starting out in 2nd or are you shifting up thru first and neutral into 2nd? Then you state that when you "pin it" it goes. Goes where? I assume you mean it will run when you "pin it".
bottom line, it sounds like clogged jets in the carb(s) and that requires you to take it to someone who knows what they are doing, or for you to invest in a repair manual for your bike, some basic handtools, and a basket type carb cleaner with some lint free towels and an air compressor to blow out the jets.