I have a 2013 foreman 500 4x4 es. It doesn't want to shift from 1st to 2nd however from there on very smooth. Down shifts no problem. Sitting still it will shift 1through 5 no problem but with throttle applied from 1 to 2 is not happening. I have pulled shift motor cleaned out old grease and applied new lithium grease. It certainly seems to help the other 3 gears operate more smoothly. In looking someone has put an aftermarket motor assembly on it.Does it or will it make a difference to use the OEM replacement part for this problem. BTW when engine switch is activated there is no blinking or whatnot it goes straight to neutral as it was put in.