The 9402 has timing marks on the flywheel. The carb 580 gets it's timing based on the magnet position. Are inner diameter and flywheel key to magnet position the same?I'm looking for some info please. Looking to replace my 95 ZR 580 (carb) flywheel/magneto. The one that came off is a FP5448, my questions is, will a FP9402 flywheel work in it's place? The look very similar, just need confirmation before I put it all back together and find that they are not compatible. Thanks!