SOHC.co.uk Forums > CB750

Taper roller bearings

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Yoshi823:
It may well be worth contacting Dave Silvers with your experience of this kit Peter...just so's others don't get the same results.

andut:
... resurecting an old thread as I've hit a similar problem !

I'm fitting a DSS taper brg kit to my 400F2 steering column.  The thickness of the new tapered lower brg was a little thinner than the original ballrace, so I used the washer (about 2mm) that came with the kit and a dust shield which made the new lower brg about 1mm thicker than the original. 

Top brg appears to be seated, but sticks out of the top of the headstock by a few mm as per Spitfire's photos above and I can now only get a couple of turns on the top nut after pulling the brgs home as much as possible (had to use the top yoke nut and spacers to pull the column up into the headstock before I coud get the steering nut on) & backing the nut off to allow the steering to turn.  I've only got the yokes fitted without forks or wheel, so I'm sure with the added weight of the front end, I'll be able to get another half turn or so on the nut and still have free movement.

Has anyone else had similar experience ?

I'm hoping a few miles will further bed things in and allow me another thread or so no the steering nut - does that sound likely ?

The thought of pulling the new tapered brg & washer off of the steering column does not fill me with joy !

Thanks again for any help or advice !  Andy

martin_uk:
I believe that the size of lower washer/shim depends on the comparison with the bearing stack from original set up.

With mine I assembled the old  races with ball bearings and compared to the thickness of the new taper roller and seat,

I did not need the thick washer.

You need to make sure steering stops align and if there is a steering lock that this can engage into stem.

The top taper race does sit higher, so may need to use extra O rings or rubber washers when fitting tube type headlight mounts.

martin_uk:
found this which may help

http://forums.sohc4.net/index.php?topic=144348.0

andut:
Thanks Martin,

I did use the old brg as a benchmark, and it was taller than the new tapered brg on it's own, and then shorter than the tapered brg with washer, but only by about 1mm, so I went with the washer !

Strg lock stops do engage as it is and the steering lock also works, so I can't be far out, but I'd rather have a few more threads engaged on the steering nut above the top brg !  I'm assuming it will bed in and give me a bit more once it's been in use - fingers crossed !

Andy

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