steering head bearings

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kobra
Posts: 798
Joined: Sun Sep 16, 2018 12:53 am
Location: Bay Area CA

Re: steering head bearings

#16 Post by kobra » Fri Sep 03, 2021 3:36 am

The real issue is that the extra 2mm of height now means your steering stem nut has 2mm less threads to clamp on, and the bearing rests partially on a threaded portion of steerer tube rather than a fully unthreaded portion.

When I rebuilt my bike I had a front-end clunk that I could not figure out. The bearings were tight, everything was solid, but I could get a clunk on hard braking. It was the steerer tube moving inside the upper bearing inner race. The gap is too small for a shim but large enough to be noticeable. Some JB weld fixed that right up and it's solid now. I applied a small ring of it and sanded it until the bearing fit snugly.

Something to keep in mind.

75RD350rider
Posts: 607
Joined: Thu Jun 19, 2014 9:52 pm

Re: steering head bearings

#17 Post by 75RD350rider » Fri Sep 03, 2021 12:13 pm

Thanks!!
I love the smell of Blue Marble in the morning!
Tim Steele in Front Royal, VA

olgreyhair
Posts: 15
Joined: Fri Apr 30, 2021 8:24 pm

Re: steering head bearings

#18 Post by olgreyhair » Sat Sep 04, 2021 1:23 pm

Is it the same situation with the lower bearing race? Does that also extend beyond the bottom of the steering stem?
Was just getting ready to do my 84 also. Notchy when turning the bars.
Great info. Thanks. george
1984 RZ350
2007 BMW R1200RT
1995 Honda CR250(bought new)
White Haven PA

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