I have recently purchased a 2013 YFM450FWA it has 3900km and about 150hrs. I did a brake service on the front end and noticed that the front left wheel rotates smooth as silk and the front right kinda binds almost like a bad bearing or the ring and pinion gear being meshed too tightly. Because of this I took the drive shafts out to see if it was a wheel bearing. It was not the bearing but was for sure in the diff. I took the front diff out and once out and the driveshaft was disconnected everything was smooth. So the roughness felt is only when holding the input shaft so that it can't rotate and then trying to turn the front right cv shaft. The question that I have is... is this a normal "feel" when the machine is in 2x4? I hope I explained this correctly. Thanks in advance for your responses.