CX500 Main bearings where to get

17949 Views 32 Replies 12 Participants Last post by elcaminolv, Oct 15, 2018

TREV2010

Discussion Starter · Nov 16, 2010

Where can one get a set of main bearings for the CX or is there an alternative part one can use?

THKS

TREV

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21 - 33 of 33 Posts

guelli02

· #21 · Dec 7, 2013

muzza said:
a reputable engine rebuilder will be able to supply you the bearings you need

Why not to produce (bronce) main bearings like these ( ? )

These are used for BSA 650 etc.
Produced with an undersize, so you can grind the crank and have to customize the bushes/bearings for the correct size.
The bushes must be installed into the crank house to get the right/correct angle for the crank and rods.

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CJCombrink

· #22 · Dec 7, 2013

guelli02 said:
Why not to produce (bronce) main bearings like these ( ? )
View attachment 6682

These are used for BSA 650 etc.
Produced with an undersize, so you can grind the crank and have to customize the bushes/bearings for the correct size.
The bushes must be installed into the crank house to get the right/correct angle for the crank and rods.

Yup, if I don't come right, it looks like this will be my only option..

I am really not wanting to spend MORE money on custom engine bits (I've already spent more on engineering than what I paid for the bike originally) but it may be my only option.

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murrayf

· #23 · Dec 7, 2013

check with the machine shop but you can get any 2 have them fit and the crankshaft ground to match

Honda Main Bearing A CX500 GL500 1978 82 13325 415 305 | eBay

Honda CX500 Brg C Main Brown 13327 415 305 | eBay

Palier B Noir Neuf Orig Honda CX 500 78 A 82 GL 500 Noir Ref 13326 415 305 | eBay

check with th emachine shop but you can get any 2 have them fit and the crankshaft ground to match

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CJCombrink

· #24 · Dec 21, 2013

Thanks Murray, I ordered the 2 brown ones and a black - they are on their way down to A-A-Africa.

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Maurice

· #25 · Nov 13, 2016

Hi Trev2010 did you manage to source main bearings for your cx500 and if so can you give me an address. Thanks Maurice

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ercrwe

· #26 · Mar 9, 2018

guelli02 said:
Why not to produce (bronce) main bearings like these ( ? )
View attachment 6682

These are used for BSA 650 etc.
Produced with an undersize, so you can grind the crank and have to customize the bushes/bearings for the correct size.
The bushes must be installed into the crank house to get the right/correct angle for the crank and rods.

What exactly are these from?

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guelli02

· #27 · Mar 9, 2018

ercrwe said:
What exactly are these from?

As I wrote Bronce.

For the type of bronce I have to ask my friend who sold a lot of these bearings for the old BSA*s

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murrayf

· #28 · Mar 9, 2018

i tried bronze bearings they do not last long at high rpm and load

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guelli02

· #29 · Mar 9, 2018

The bronze bearings in the picture are for BSA A650 with it's longstroke engine and 53 bhp @ 7000 rpm.
And good to run for minimum 50.000 km

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murrayf

· #30 · Mar 9, 2018

yes but try doing them and installing them in the cx case with out the support flange thrust design like the bsa bearing

they dont work !

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reclinedrelic

· #31 · Mar 9, 2018

Qurious, would it be possible to renew the bearing surface in old bearings? I know it would require some custom made tooling. I think of my Model A Ford with cast in place babbitt bearings.

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guelli02

· #32 · Mar 10, 2018 (Edited)

reclinedrelic said:
Qurious, would it be possible to renew the bearing surface in old bearings?

Yes.
Here is a picture how they made it in former times. Nowadays they will have better technical solutions

((Source of the picture is: https://nagygepmuhely.shoprenter.hu/ and : http://www.motorenspezialist.com/produkte/gleitlager.html ))

Not necessary to explain that the bearing points on the crankshaft must (first) be ground.

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elcaminolv

· #33 · Oct 15, 2018

Hi Guys!

Has anyone come across new original or aftermarket main bearings lately?
Rebuilding an engine and could find only the con-rod bearings...

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21 - 33 of 33 Posts

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