Author Topic: Steering Yoke Ball Bearings 400/four  (Read 406 times)

Offline Macabethiele (Ted)

  • SOHC Pro
  • Posts: 577
    • View Profile
Steering Yoke Ball Bearings 400/four
« on: February 07, 2021, 09:10:06 PM »
Does anyone know if the steering race ball bearings are a standard size or can you buy a complete kit DS want 29pence each for them?
Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

Offline Johnwebley

  • SOHC Jedi
  • Posts: 2626
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #1 on: February 07, 2021, 09:30:22 PM »
Check out the local industrial estate for bearing supplies.

They should have loose balls.

If you will pardon the expression

Get them to mic them for size

Sent from my SM-A750FN using Tapatalk

lifelong motorcycle rider,and fan

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
  • Grogu
  • *
  • Posts: 6166
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #2 on: February 07, 2021, 09:41:17 PM »
Also try push bike shops.
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline TrickyMicky

  • SOHC Member
  • Posts: 131
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #3 on: February 07, 2021, 11:13:57 PM »
Please forgive me if I've missed something obvious, but if you've gone to all the trouble of dismantling the front end, surely it's a lot less hassle just to replace the whole lot with a set of taper roller bearings. From the way I've read it, it gives the ipression that you are leaving the old races in place and just renewing the balls?

Offline Macabethiele (Ted)

  • SOHC Pro
  • Posts: 577
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #4 on: February 07, 2021, 11:34:01 PM »
If taper bearings were a straight fit that would be great but from what I have read it isn't and you end up with not much thread when you fit the top nut unless someone has made a conversion kit. Naturally I would replace the races if badly worn. It appears the top race bearings were more corroded on mine. Does anyone know the size as a don't have a micrometer as yet.




« Last Edit: February 07, 2021, 11:36:33 PM by Macabethiele (Ted) »
Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

Offline Macabethiele (Ted)

  • SOHC Pro
  • Posts: 577
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #5 on: February 08, 2021, 09:57:44 AM »
I understand most of the wear force sits on the lower bearing so am wondering if a hybrid arrangement  is more practical - taper bearing at the bottom plain at the top ?

Then again for my likely low summer mileage perhaps original is more straight forward ?

Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

Offline Oddjob

  • SOHC Jedi
  • Posts: 3816
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #6 on: February 08, 2021, 10:30:19 AM »
According to the parts diagram and the manual there are 37 ball bearings, 19 in the top and 18 in the bottom, they are called #8 ball bearings which according to the web means 1/4".

Like these.

https://simplybearings.co.uk/shop/product_info.php?products_id=38916&vat_inc=true&gclid=Cj0KCQiA34OBBhCcARIsAG32uvPGEh1MrUYLnvlT3sG_BtrNgFn62NT0DsiaJaeC6kmnygPfawxXsMwaAi_OEALw_wcB

£4.33 for 50.
Don't play stupid with me, I'm better at it

Offline Oddjob

  • SOHC Jedi
  • Posts: 3816
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #7 on: February 08, 2021, 10:46:37 AM »
Might be too late to add Ted but best thing to do if you want to fit taper rollers is to measure the stem sticking through after the top yoke is removed but before the castellated nut is undone. Most taper roller kits come with spacers to fit underneath the lower taper roller, it's working out which is the correct one usually. So tap the lower taper roller down onto the bottom yoke stem but not all the way, fit into frame and install top taper roller and castellated nut. Compare length of stem to original length and you should be able to work out the spacer needed after subtracting the space underneath the lower taper, reason for not fully driving it home is to make it easier to remove to fit the spacer.
Don't play stupid with me, I'm better at it

Offline Bryanj

  • Grogu
  • *
  • Posts: 7598
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #8 on: February 08, 2021, 11:49:00 AM »
I found the problem is if you use a thin spacer the bottom yoke came up against the frame and thinest spacer i found was 1mm.
Possibly you could grind some off the frame at bottom but not tried that

Offline Macabethiele (Ted)

  • SOHC Pro
  • Posts: 577
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #9 on: February 08, 2021, 12:11:32 PM »
According to the parts diagram and the manual there are 37 ball bearings, 19 in the top and 18 in the bottom, they are called #8 ball bearings which according to the web means 1/4".

Like these.

https://simplybearings.co.uk/shop/product_info.php?products_id=38916&vat_inc=true&gclid=Cj0KCQiA34OBBhCcARIsAG32uvPGEh1MrUYLnvlT3sG_BtrNgFn62NT0DsiaJaeC6kmnygPfawxXsMwaAi_OEALw_wcB

£4.33 for 50.

Thanks for the link I have ordered some. I'm probably stuck with DS for the upper & lower races I think it works out at almost £70 for the pair!
« Last Edit: February 08, 2021, 06:04:02 PM by Macabethiele (Ted) »
Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

Offline Macabethiele (Ted)

  • SOHC Pro
  • Posts: 577
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #10 on: February 10, 2021, 06:01:53 PM »
Please forgive me if I've missed something obvious, but if you've gone to all the trouble of dismantling the front end, surely it's a lot less hassle just to replace the whole lot with a set of taper roller bearings. From the way I've read it, it gives the ipression that you are leaving the old races in place and just renewing the balls?

Having priced up the parts from DS I'm looking again at your suggestion to fit taper rollers they do seem a cheaper & better option. I've found these on e-bay after a search. What's the catch probably do not fit!! The lower race has a larger OD than the upper one.

https://www.ebay.co.uk/itm/Steering-bearings-taper-roller-Honda-CB250-350-400-450-500-550-650-750-super/153984339007?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

And a spacer https://www.ebay.co.uk/itm/Honda-CB-400-F-Four-75-79-Headstock-Steering-Taper-Bearing-Spacer-OE-324005/184349619747?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

https://www.ebay.co.uk/itm/Honda-CB-400-F-Four-1975-1979-Headstock-Steering-Taper-Bearing-Top-OE-324803/184340453514?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

Clearly I need to get my calipers on the old races.





Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

Offline Macabethiele (Ted)

  • SOHC Pro
  • Posts: 577
    • View Profile
Re: Steering Yoke Ball Bearings 400/four
« Reply #11 on: February 11, 2021, 12:15:15 PM »
I've found what sounds like a supplier that will sell me a pair of bearigs with a spacer to suit. Currently out of stock in the cheaper option for my particular model of Honda but the dearer option is £30.00.

As & when the bits arrive I will update with details of my fittment experience.
Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

Offline mickwinf

  • SOHC Master
  • Posts: 1265
    • View Profile
Love the 500/4 and 550 own a 550 f2 at the moment

Offline Seabeowner

  • SOHC Pro
  • Posts: 640
    • View Profile
Phil
1971  CB500K0  Candy Jade Green
1973  CB500K1  Candy Ruby Red
1975  CB550F1   Shiny Orange
1978  CB550K     Excel Black

Offline Macabethiele (Ted)

  • SOHC Pro
  • Posts: 577
    • View Profile
Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal