Author Topic: Taper bearings  (Read 482 times)

Offline K2-K6

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Re: Taper bearings
« Reply #15 on: March 18, 2021, 05:30:16 PM »
I think you're right there regarding dimensions.

But it's complicated by the top taper bearing bearing thicker than the original ball race,  hence the concern arises of threads left to complete assembly on the stem.

What it seems to need is to "pinch" enough height at the bottom, while still getting clearance for the fork to turn, which then leaves some small room for compensation at the top.

If you get the total stack height of both bearings together, then compare to original to give more complete picture.

Offline Sesman

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Re: Taper bearings
« Reply #16 on: March 18, 2021, 05:32:22 PM »
Hey, good idea.

Thanks.

Offline Sesman

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Re: Taper bearings
« Reply #17 on: March 20, 2021, 08:42:00 AM »
Jamie thinks 4mm spacer is correct?

Offline Sesman

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Re: Taper bearings
« Reply #18 on: March 20, 2021, 11:22:35 AM »
Ok,for those who need or would like to know.

For a 1977 550 F2, the taper roller set supplied by DS complete with thick spacer works perfectly. Thanks to Oddjob, Bryanj and Ted.

DS, apologies, how could I have doubted you. :-[


Offline Oddjob

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Re: Taper bearings
« Reply #19 on: March 20, 2021, 03:33:26 PM »
I have a set of taper rollers bought for my CB1300. In the set are 2 seals which fit under the bearings and go round the outside of the frame, top and bottom. Whilst I have the 500 apart I'll see if the seals fit and maybe reduce the size of the bottom spacer washer to accommodate the very slight size increase.  I do recall the spacer on mine when I fitted it 30 odd years ago was quite thick, around 3mm or so I'd guess. Once I've removed the bottom taper I'll measure it and see what it was.

I would say the seals are an attractive addition if they fit. One has a 32mm internal diameter with an 52mm internal size on the seal, the bearing is a Koyo 32006JR BTW, the other is an NTN CR-0574 bearing and the seal is 27mm internal diameter with a 45mm internal diameter on the seal, without looking I don't know how they compare to the kit provided for the SOHCs Hondas.

Thinking about it though, the bottom one may be fine but as the tapers protrude past the frame on the top on the SOHCs maybe the top one is of a limited use.
Don't play stupid with me, I'm better at it

Offline Trigger

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Re: Taper bearings
« Reply #20 on: March 20, 2021, 06:29:31 PM »
If you read half way through this thread, you will not know if the bearings are good until you go to fit the headlight brackets. >>> http://www.sohc.co.uk/index.php/topic,20419.45.html

Offline Sesman

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Re: Taper bearings
« Reply #21 on: March 20, 2021, 06:54:24 PM »
Ok on that one trigger. Mine are goosed so fitting some some cheap aftermarket items bought for the Triton.

But thanks for the heads up, I’ll check for forum member info though.


.

Offline Sesman

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Re: Taper bearings
« Reply #22 on: March 20, 2021, 09:02:14 PM »
As you predicted.


Offline Trigger

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Re: Taper bearings
« Reply #23 on: March 21, 2021, 01:11:35 AM »
The only way i have found to fit these taper bearings correctly is, mill the seat on the inside of the head stock on the frame by 6mm and the taper cup sits lower and the gap for the headlight brackets is correct.
If not fitting OEM headlight brackets, you have to forget about the top yoke chrome washer as, there is not enough thread with the washer to hold the top nut safely  ;)

Offline Sesman

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Re: Taper bearings
« Reply #24 on: March 21, 2021, 07:05:18 AM »
Agreed. Returning to Mr Honda’s original solution and loose ball races. When I’ve resolved the bottom yoke twist....

 

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