Author Topic: Tapered Steering Bearings Thread  (Read 124490 times)

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Offline bryanj

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Re: Tapered Steering Bearings Thread
« Reply #600 on: June 29, 2020, 01:36:46 pm »
It should be all the way in but that race is fubar with the lines and pits. When all the way in the only way to get them out is with a dremel as the top lip is hidden
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Offline PeWe

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Re: Tapered Steering Bearings Thread
« Reply #601 on: June 29, 2020, 09:09:17 pm »
If you turn it slowly and feel no dents it should be OK.
There is a risk that there qre small dents making it to almost stop when lightly turned.

My last CB750 K2 build had also tapered bearings from a PO many years ago. Looked OK but I felt a dent that added friction during a very light turn. This is not accepted by vehicle inspection here so I bought a new set.

I replaced one by one and tested after each. It was the lower race that caused it. Difficult to see damages. Maybe a badly done install. I tested on the triple with no forks in.

My K6 however, where I installed  the bearings early 80's are still OK. These last forever as long as they are not  banged together. This kind of bearings are used as car wheel bearings and have s very tough life compared with steering on a bike.
« Last Edit: June 30, 2020, 12:36:08 am by PeWe »

Offline 754

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Re: Tapered Steering Bearings Thread
« Reply #602 on: June 29, 2020, 10:42:06 pm »
Could be stain on the race, give it the fingernail test , see if it's a pit
 2 ways to getveaces out, it wrecks them
 Weld 2 beads on the bearing about 7/8 long, shoukd shrink it enough.
 Or weld a strap across it,  or a big washer, then knock it out.
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Offline Alan F.

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Re: Tapered Steering Bearings Thread
« Reply #603 on: June 30, 2020, 01:52:54 am »
I've long considered making a thin bushing to put up in the neck before the race, so I can drive the race out if I ever need to. Diameter is easily remembered as 1.969" (50mm) never figured out minimum thickness, maybe .030-.040" (.75-1mm)  would do? That's just a little thicker than the lower seal and shouldn't affect much.
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Offline bryanj

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Re: Tapered Steering Bearings Thread
« Reply #604 on: June 30, 2020, 02:54:18 am »
Pewe, wheel bearings last a long time because they rotate complete revolutions which is what they are designed for, i'm guessing the maximum angle lock to lock of a bike is 90 degree and for most of the time they are in one position so although the rollers are relatively long will still indent into the race causing exactly the same "notchy" steering as worn ball races and fail inspection. Go ask the Goldwing boys about worn tapers.
The theory is wonderfull but practice dont always add up. Tapers, if adjusted right, will handle better and if kept adjusted SHOULD last longer but they are not the magic fix that everybody seems to think they are
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline 754

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Re: Tapered Steering Bearings Thread
« Reply #605 on: June 30, 2020, 12:54:27 pm »
On the chopper frame, I am thinking of grinding 2 notches  180 deg apart... to be able to punch out bearings .. its a solid tube.
 On the Honda neck, the way it's made.. may be bad idea.

 Weld trick works great if you can stay only on the race area.. not the place to practice welding.
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My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Online Medyo Bastos

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Re: Tapered Steering Bearings Thread
« Reply #606 on: June 30, 2020, 01:07:00 pm »
I spray pb blaster on them. They normally fall out on their own after a while of soaking..


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Offline Malovski

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Re: Tapered Steering Bearings Thread
« Reply #607 on: June 30, 2020, 01:28:11 pm »
Thanks everyone for your advise! Bummer that the races seems to be worn out... :( I went down earlier today and closely inspected the races. What can be seen in the picture is indeed scoring/pitting and easily felt with my fingernail. It's not very deep tho and the race feels completely smooth if I feel with my finger and not my fingernail. Does this still mean that they are totaled, should I test to regrease and reinstall everything and check how the steering feels or would that just be a waste of time? As the lower race is not seated completely I do think I will be able to drive them out with a punch if needing replacement (I don't have access to a welder). If the bearings need to be replaced, is there any certain make of tapered bearings that is recommended? I have for example noticed that All-balls come with dust shields, while others like the ones sold by Davidsilver does not. Thinking of buying new All-balls of ebay at the moment!

Offline bryanj

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Re: Tapered Steering Bearings Thread
« Reply #608 on: June 30, 2020, 01:30:36 pm »
An damage to the hardened race means they are junk
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline scottly

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Re: Tapered Steering Bearings Thread
« Reply #609 on: June 30, 2020, 08:13:06 pm »
I bought an All Balls kit from a member of a different forum, so now I have some measurements. The height of the stock lower bearing assembly is .718". The tapered bearing is .563" tall, so we need .155" of spacer under the bearing.The lower washer #99-1054 is .115" thick, while #99-1011 is .183". The metal part of the seal is .025", so with the .115" washer would be .140" for a total of .703", which is close enough.
At the top end, I had a surprise: the top of the inner races I've used before fit neatly inside the nubs on the bottom of the adjuster nut, but the top of the All Balls part is much larger diameter, and the upper washer Must be used. The washer is .078", and the upper seal is another .025", so if too thick of a spacer is used on the bottom, there may not be enough threads on the stem for the adjustment nut to fully engage.
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Online Medyo Bastos

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Re: Tapered Steering Bearings Thread
« Reply #610 on: July 01, 2020, 10:54:26 am »
That is correck keemosawbee


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