Not really longer stoke creates more toque shorter stroke allows the engine to create more rpms u can ask any real mechanic that and he will tell u and 4 strokes have more all around torque instead of building up to the powerband
Look it up. A two stroke 250 has a MUCH longer stroke than a 250f. Heck look at the visible parts of the cylinder. The 2 stroke will be 6-7 inches visible and the 4 stroke may only have 3-4 inches of. Cylinder showing.