I have a CT Racing 240 big bore kit, the CT 240 big bore and the LA sleeve big bore kit both have a bigger cylinder with a bigger reed cage.. I have a VF3 250R reed cage in my CT 240 big bore kit now and i think all the 250R reed cages are the same. I dont think it is possible to fit a 250r reed cage in a stock blaster cylinder but i may be wrong.. I have seen some people fit bigger reed cage in there blaster but i dont know what they were from. I do know that there is a reed for a yz80 with the same part number as a blaster reed and the reed cage for the YZ80 looks similar to the blaster reed cage, but does not look any bigger.