Create a tattoo for a man's chest featuring two cylinder heads (motorcycle engine like a Harley Davidson). The cylinder heads should be partially in cross Section to reveal the pistons, piston rods, valves, and cams. Additionally, part of the engine with the crankshaft should also be in cross Section. You might add a spark or flames to one cylinder (simulating the explosion phase) and perhaps the exhaust phase to the other. Try to prepare the background for potential extension of the tattoo. tattoo idea