Whats the difference between long rods and stroker crank




97 blaster
97 shee 410 /40 horse nos
98 shee 420 long rod /both stretched
00 trail blazer
02 ds 650 stock
02 kaw 650
03 kaw 650
03 400ex /440,xr400cam,rev box

 

Long rod is just an increase in the rod lenth. This requires a shorter pin height (distance from center of wrist pin to top of piston) or a plate between the crankcase and cylinder. A stroker crank inreases the distance the piston moves by relocating the crank pin towards the outer edge of the weights. Stroker increases the cc's of the engine. The long rod changes the angle the rod is at as it pushes the piston up, reducing load on the cylinder wall.