The Krebs cycle charges only ADP, but the energy contained in ATP can be transferred to one of the other nucleosides by means of an enzyme called nucleoside diphosphate kinase. This enzyme transfers the phosphate from a nucleoside triphosphate, commonly ATP, to a nucleoside diphosphate such as guanosine diphosphate (GDP) to form guanosine triphosphate (GTP).
Bigger jets allow more fuel and smaller jets allow less. The rejetting process figures out which size jets is needed to keep an engine running with the right mixture. Too little fuel and the engine may starve or overheat at high RPMs.Too much fuel and the engine could flood and bog out.hares & Saves. Save. Replacing an exhaust with a carburetor-type engine is more than just bolting on a new pipe. Whether itâs a car or motorcycle or scooter, you are likely going to need to make sure your carburetor is running with the correct jetting for the new exhaust.
A more compact design in comparison with 4 stroke engine is possible because the intake and exhaust valves can be replaced by ports (holes) in the cylinder liner, the opening and closing of which can be directly controlled by the piston motion. The two strokes are the following: Compression stroke: after closing the inlet and exhaust ports, the piston compresses the cylinder charge (in the meantime, the volume in the crankcase increases, drawing fresh charge into the crankcase by depression).