I'm going through axle bearings about every
2 months. Any idea why?

 

Im not to familar with the 250x carrier. If its like the 250r, with a cross tube in the middle, and a grease zerk in back, I may know the problem.

I too went through a set or two before I knew how to properly install the bearings. Heres what I did on my 250r last time. Once I had the bad bearings out of the housing, I cleaned everything up spotless. I Removed the grease seal from one side of the bearing, then inserted the bearing, no grease seal side in. Insert the cross tube. Remove the grease seal from one side of the other bearing. Insert bearing (no grease seal side in) into housing. Pump zerk with grease until it starts coming out around each end of the tube. Work the cross tube around and pump some more grease in. This way there is plenty of grease in there to lube the bearings.

I think most people install the bearings with both grease seals on. By doing that there is minimal grease inside the bearing, which wont last at all.

If your housing doesnt have a zerk, at least take the grease seals off and pack as much grease in as you can. Then re-install the seals. They are easily taken out with a small flat screw driver. You can also use the screw driver to press the seal back in.

Hope that helps you out. I know replacing bearings isnt the easiest thing to do!!

 

I had the same problem with my 300. However, I had several reasons causing bearing failure--
1. Is the axle so wore that the inner race of the bearing fails to get a good seat when you put it together?? try sliding a bearin only over the axle to be sure the tolerences are still pretty close. If not the bearing will spin on the axle, causing it to get hot and basically weld the internals causing the problem to get worse. If this is the case-- replace the axle or if you you are really inclined, you can weld the axle up on the bearing races and have it put on a lathe and shaved back to original size.
2. Same problem, just the opposite side-- Are the bearings seating in the bearing carrier good?? Once again, if the carrier is worn the bearings will spin inside of it once assembled. I don't know of any fix for this other than replacement.
3. CHECK THE SPACER TUBE!!! if it is even a har too short it will cause bearing failure very quickly. Look for the ends to be mushroomed from being over tightened. If it is even a hair too short, it causes excess side load on your bearings once tightened. These bearings were originally designed for AC units, they don't offer much reliabity to side loads (which are very severe in ATV's) so the bearings will soon fail. You can either replace the tube (www.servicehonda.com has them for like $19) or try to find two bad ones with one good end each and then you can cut them to make one. It really doesn't matter if they are in 2 pieces jsut make sure they are the right length.