SOHC.co.uk Forums > CB350/400
Steering Head Bearings
McCabe-Thiele (Ted):
--- Quote from: AndyD on August 20, 2021, 04:32:04 PM ---Update on the Wemoto bearings.
Had another play with the upper set - popped a couple of loose ball bearings in to see how it would build up if the caged bearings did fit properly.
The race seems correct and as original but the cone is quite different and when fitted the set is several mm higher than standard so not much use.
(Attachment Link) (Attachment Link)
Shame as the bottom set seems perfect and the top would be if the cage fitted and the cone was the same profile as original.
I just wonder why someone has put together all these varieties of replacement bearing sets that just aren't correct.
Wemoto are looking into this so maybe the supplier can explain / correct things.
Cheers,
Andy
--- End quote ---
This was the set of plain rollers I bought when I could not find a suitable upper taper. At £15 for the pair not too expensive. I'm pretty sure you will be able to buy just the upper bearing if you contact the firm. The dimensions given I can confirm were accurate. Might be worth sending a PM to 4wDaz he sourced me some Primary Drive bearings at a great price.
https://www.ebay.co.uk/itm/324462234796
McCabe-Thiele (Ted):
Although I'm sticking with my existing mixture of bearing types I have purchased the top taper roller bearing from Pyramid parts and can confirm they are the same dimensions including the all important height at 15 mm. So looks like anyone can fit taper rollers if they want to on a 400/4. I'm thinking of fitting some sort or shield/deflector to reduce water reaching the lower races. I'm sure with it having a 3 mm spacer a better seal could be fitted.
Athame57:
--- Quote from: Macabethiele (Ted) on August 22, 2021, 04:07:40 PM ---Although I'm sticking with my existing mixture of bearing types I have purchased the top taper roller bearing from Pyramid parts and can confirm they are the same dimensions including the all important height at 15 mm. So looks like anyone can fit taper rollers if they want to on a 400/4. I'm thinking of fitting some sort or shield/deflector to reduce water reaching the lower races. I'm sure with it having a 3 mm spacer a better seal could be fitted.
--- End quote ---
Which size would I need to order from them on their drop menu? https://pyramid-parts.com/products/ssbmain
McCabe-Thiele (Ted):
--- Quote from: Athame57 on August 22, 2021, 08:08:02 PM ---
--- Quote from: Macabethiele (Ted) on August 22, 2021, 04:07:40 PM ---Although I'm sticking with my existing mixture of bearing types I have purchased the top taper roller bearing from Pyramid parts and can confirm they are the same dimensions including the all important height at 15 mm. So looks like anyone can fit taper rollers if they want to on a 400/4. I'm thinking of fitting some sort or shield/deflector to reduce water reaching the lower races. I'm sure with it having a 3 mm spacer a better seal could be fitted.
--- End quote ---
Which size would I need to order from them on their drop menu? https://pyramid-parts.com/products/ssbmain
--- End quote ---
For the top one it's 26 x 48.5 x 15 you have options for the lower one they list for 30 x 50 x 14 with an appropriate spacer (they do list one at only 13 mmm tall). Quite a few sellers make bottom roller bearings that fit so other makes are available.
This link is for individual bearings rather than a kit.https://www.ebay.co.uk/itm/290781743090?var=590082068373
Kit looks like BR29 & it has seals! https://pyramid-parts.com/products/ssbmain?variant=40126403591
Helpful fitting guide too.https://pyramid-parts.com/pages/steering-head-bearings-fitment-guide
Please double check my findings before you order.
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