Which size of pilot jets makes the engine run cooler?
This is based on my experience with my ’86 FJ and SS2R: If you have the stock exhaust & airbox, then the 37.5 (3-4 turns out) or 40 (2 turns out) will probably work best. If you have an aftermarket exhaust w/ stock airbox then the 40 (4 turns out) or 42.5 (2-3 turns out) are about right. With aftermarket exhaust and individual air filters, the 42.5 (3-4 turns out) is needed. “Turns out” refers to the pilot screw settings. You will have to tweak the pilot screw settings a little, but this should get you into the ballpark.
