I have a blaster with FMF fatty and power core 2 and FMF torque reeds, and uni air filter. It has 250 jets(probably gonna move pu to 260). I want a wiseco prolite piston and a 80 overbore but i think thats too much. Which should i get.

 

HDP 240 kit

 

defimatly go with a 240 setup

 

I know its your cash, but boring it to 80 over is just wasting your cash and trashing your cylinder, it won't give you any noticable power gains, it will only take service life away from your cylinder, your going on the misconception that the bigger the bore, the more power you'll make, well thats totally farsical when it comes to increments of increase so small that power is not noticable, the 240 blaster cylinder uses a totally different sleeve and being the blaster bore at 80 over is 68mm and a 240 bore is 72mm, thats a 4mm difference, which is far more than 80ths, don't bore the stock sleeve any bigger than needed to clean up the bore if damaged.

 

Look into shaving the head. You will probably notice the difference from this more then the bore