SOHC.co.uk Forums > CB350/400
Does anyone know the diameter of the CB400F2 steering shaft at the base?
K2-K6:
Some pictures on page 4 of that link show a little more details.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
The original "stack" height has a seal washer for the bottom race which the new kit may not have.
McCabe-Thiele (Ted):
Reading the 2005 link it does not appear to be about the CB400 but a CB550.
Putting that aside what is interesting is that the taper bearing measurements quoted appear to be as follows:
Top 26 x 48.5 x 15.2 mine are 26 x 48.5 x 15.70 so a little taller. Original ball bearings Top 26 x 48.5 x 14.0 approx.
Bottom 30 x 50.0 x 14.4 mine are 30 x 50.0 x 15.14 so a little taller. Original ball bearings Bottom 30 x 50 x 17.8 approx
I guess they are just a different kit to mine hence the hight differences.
My old Top Ballrace measured about 13.5-14 mm: Bottom Ballrace measures 17.55-17.60 with calipers. I need to double check this but this explains why they sent a 4 mm spacer but that ought to be nearer 2.54 mm. Original bottom yoke spacer is 0.95 mm.
I guess what I need to do is get the outer bearing races fitted into the frame and look at it then -
McCabe-Thiele (Ted):
This is my bottom bearings visual comparison - I guess it will need some spacing but 4 mm is way too much.
Bottom bearings by Macabe Thiele, on Flickr
McCabe-Thiele (Ted):
This is my top bearing the roller replacement is in the range of 1.7 -2.2 mm taller than the ball bearing type.
Top bearings by Macabe Thiele, on Flickr
McCabe-Thiele (Ted):
Sorry about asking this question again in another way it would be completely unnecessary had I taken more photos as I was dismantling the steering and taking off the forks. I was in such a rush to strip it down & tbh the idea of fitting taper rollers was not on my mind.
I have it in my brain that when I removed the top yoke that there was a fair bit of thread section above the addjustment nut. Reading about taper roller conversion posts seems to mention a thread shortage issue or even fouling at the bottom if the spacing is not right on the lower bearing.
Having established that my lower bearing is not as tall as the original ball bearing am wondering if my existing 0.95mm washer will work rather than making up the whole difference in bearing thickness with a spacer. Just not sure what difference 1.7mm loss of bearing depth will make.
If I manage to source 2.5 mm spacer to replace the original 0.95 mm this would be close to the original at the bottom but I still have the problem of the top bearing height being 1.7 mm taller, so is there enough thread on the adjuster to not have to worry about it ?
Still leaves me with the fall back position of putting a ball race at the top provided the two styles are compatable.
Lastly of course there is the steering lock engagement to consider - am I overthiking this & boring everyone ?
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version