Steering Stem Bearing Replacement

Here is the steering stem bearing replacement on a Yamaha WR450F 2012 enduro motorcycle. The procedure is similar for most off-road/MX/dirt bikes. We had a problem with the inner race of the bottom bearing and solved it by loosening the inner race with a Dremel. Using a chisel, as the manual says, looks impossible. Also, we don't think that you can cut the inner bearing race and split it with a chisel. It is very difficult or impossible to cut the inner bearing race deep enough, as you can touch the clamp and cannot make a 90-degree cut, only a curved one.

The main reason for stuck races is water, which leads to rust. We recommend thoroughly packing the seals and bearings with grease to prevent water from entering. Also, if you drown the bike, disassemble the steering stem and service the bearings, like all the other bearings of the bike.

All parts and tools are available at our motorcycle shop.