I tried this today and it worked. Pull the sideplate from the ATV so that you have access to the gear shifter assembly. Unbolt the gearshift assembly from the mounting bracket. There are two bolts at the rear near the two rods that exit the assembly and three on the bottom. When the bolts are out, remove the assembly from the mounting bracket. Hold it in your hand and move the shift lever through all of the positions. This won't actually shift the transmission, but it should free up the rods in the assembly. Remount the assembly with the five bolts and it should now be able to shift out of reverse.