Hi! My son just got his Blaster running. he has a full Pro Circuit pipe, Vforce4 reed assembly, timing advance, 32:1 mix 93 octane, air box lid removed, and K&N filter. We started with a 290 jet and the thing runs great! Pulls hard, with no hesitation at any point. Compression was 150psi. And it passes a leak down test. This is what his plug chop looked like. Should I leave it alone? I don’t want to melt a piston. Lol Please help. Thank you