Sign in to follow this  
Followers 0

Lower Steering Stem Bearing Removal Tip


therealjuggernaut

Having to replace the stem bearings on my ancient (1999) YZ400F turned into a significant effort due to the fact the lower bearing seemed not to want to be taken off the bike. I did a bunch of research and heard everything from, weaken the bearing with a dremel (or an angle grinder) and brake the bearing with a chisel to pry it off with 2 screw drivers. Both of these methods tend to damage the stem or the lower triple clamp so weren't really an option.

Here's the method I used, first I cut the outer bearing cage with a set of dikes, then removed all the neddle rollers and set them aside. At this point I cleaned up the remaining inner race and triple clamp (to avoid the complaints from the wife for the next step). Then I dropped the lower clamp and stem in the freezer for the night.

The next morning I broke out my small propane torch and warmed the bearing remenants up just a bit, the good news here is since the whole assembly is cold the stem underneath the bearing begins to cool back off. And that is the magic window. The bearing is warmer than the stem, I just took a flat blade screw driver and a hammer and tapped on the inner race until it popped off.

Take your time (it took me a few warming and tapping cycles to get it fully off). The lower clamp isn't damaged and it's all ready for the new seal and bearing.

Now time to press fit the new one, I found a similar process for that job that involves the freezer as well. It's actually where I got the idea for the removal.


Sign in to follow this  
Followers 0


User Feedback


There are no comments to display.



Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:


  • Similar Content

    • By Bryan Bosch
      The New Podium Flight MX Handlebars are the latest in the development of our MX handlebar technology. With our own tubing profile and design we've created a non-braced handlebar that has already proven worthy of race wins. The Podium Flight bar is constructed of a 2014-T6 alloy to provide added strength. Focusing more on racers and those riders looking for the perfect balance between strength and style the Podium Flight has been vigorously tested by top supercross and motocross racers.
      PRODUCT FEATURES:
      1 1/8" clamp diameter (requires "oversized" triple clamps or bar mounts) Constructed of 2014-T6 alloy for added strength Stealth 2-Toned graphics Knurled left slide helps with grip bar adhesion Includes High density foam bar pad
    • By mebgardner
      Easy to install, no tools required Install or remove in seconds 2 sizes to fit motorcycles with 7/8in. and 1in. handlebars Relieves stress on your wrist on long trips Rests on brake lever to hold throttle open
    • By mebgardner
      Available in five different heights. Included in the kit are 2 x handlebar support lower parts and 2 x fastening bolts. The upper parts and bolts required for clamping the handlebar are taken from the original handlebar support.Available Heights Taller than Stock:
      - 32 mm
      - 37 mm"Stock Handlebar Mounts on the KTM 1190 Adventure & Adventure R"
      - 42 mm "Stock Handlebar Mounts on the KTM 690 Enduro R"
      - 47 mm
      - 52 mm
       
       
       
    • By mebgardner
      Universally applicable option for mounting the GPS bracket or road book.
    • By phantomrider101
      I was thing about geting a steering damper any one had any luck with them? I ride hare scrammbles and gncc in the mid south and alot of riders use them. Just wondering how well they work before I throw down that much cash for one. What kind do you guys recomend? I've been lookin at the WER anyone have any experience with them?