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help me jetting frustrating

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i need some help jetting my 02 ktm 250sx it has pro circuit pipe rad valve and slight head mod by j-bone motor works , new pistion and rings ,,,, jetting is as main 170 pilot 47 needle noze 3rd down from top air screw about 1- 1 1/2 out.....40:1 . runs good top end but low end kinda boggish no snap like it used t also very hard to start now multiple kicks ...where as before ice cold for four months sitting kick over second time.. live in RI roughly sea level of up to 1000ft temp's avg65.......

didi chop test plug is a nice golden brown... low end boggish... i seem to hear pistion slap now after only 2 hours of riding it is not constant though but seems only at idle................. also seems throttle cable too long i have idle screw turned all the way in to get it to idle....

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