Hi...

I recently bought from a (known to all of us – I won’t tell who…) internet site a middle bearing to rebuild my crank... It cost me 57 euros or 39 GBP if you like, without the shipping cost... Along with the bearing the guy sent me also a genuine Honda o-ring for the bearing... The o-ring was included in the price of the 57 euros... This o-ring costs 1,5 euros in my local Honda dealer when i cheked it later…
When I received the bearing I checked the box and found out that this guy had erase the Koyo part number from the box... So if I wanted to buy another I couldn't...
I was very curious then, if my local Koyo Seiko dealer was able to supply me with these kinds of bearings... Ten minutes later I was there. A nice lady was checking the bearing to see if she could supply me with additional quantity if I wanted...
Her answer...Of cource Michael, she told me… We have tons of that kind of bearing... and they cost 24 euros each ( 16 GBP )....!!!!!!!!!!!!
Also I can supply you with the side bearings of your crank if you like she said...
I am writing all these because I want to help other people not to fall in the same situation like I did...It's a shame to let people take advantage of us because we just want to keep these machines running...
If some one wants bearings for his crank and can't find, please e-mail me and I will be happy to buy them for him and send them to him...I won't be charge anything more but the exact price they cost plus shipping...
Michael - Greece

P.S. - The Honda part mumber of the oring is : 91301-KV3-771

Thats very interesting. Have you tryed to order one yet and compair?
_________________
If I have to take the carbs off once more...

Hi...

No… But I will tomorrow… Although there is no doubt that the bearing exist in stock…Lots of them…We checked the numbers and the sizes and everything was ok…

Well, let us know how you get on please. I'm sure you will help alot of people with cranks.
_________________
If I have to take the carbs off once more...

Of course I will… I will post also the Koyo part number and all the data I can get…

Hi again...

I just got in my hands the middle bearings from my local dealer...They are the same...Identical...But with 29 euros less...!!! Than the guy in the internet...!!! I want to post pictures but I don't know how...Can anyone help me...?

mixalisen

Here's the pics:

Many thanks to Apexxn uploading the photo's...
michael

Thanks for this Michael.
I was going to do the same thing myself as I`ve also bought some of the bearings from the "internet man".
I didn`t get round to it yet.

here are the other numbers

83B569AA, SH2-9TCS
83B569DA, SH2-9TCS39
_________________
Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom

pbekkerh wrote:here are the other numbers

83B569AA, SH2-9TCS
83B569DA, SH2-9TCS39

Thanks also pbekkerh.

Very nice Pbekkerh.... These are the left and the right bearing of the crank....? Did you find these bearings in your local Koyo dealer....? How much they cost...?
Many thanks for the help...

In 2001k I bought one left hand bearing, from a guy called Simon on the old list (his last one) .
I then contacted 8 Koyo dealers around Europe and found the right hand bearings in Sweden only and bought two for 120USD , and used one for a crank. At that time nobody could find the middle bearing.

In 2004 I think , there was another greek who found the bearings but I never got the ones I asked for.

For the few, here are the F3 numbers that Matt came up with on the old list
F3
Left - KOYO 83B569DA
Centre - KOYO 83B915L (L crossed out and GB engraved)
Right - NTN EC-SC 06A91 NC3 (C3 crossed out and C542 engraved)

He had the MC28 middle bearing as :83C137A
_________________
Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom

hi, are these the numbers for the outer crank bearings ?

Originally posted by pbekkerh:
here are the other numbers

83B569AA, SH2-9TCS
83B569DA, SH2-9TCS39

can i assume the f3 part numbers are no good for a standard mc21 crank ?

i am badly needing the outer bearings to get my mc21 motor rebuilt. can anyone recommend a supplier ?
cheers

richie.

Depending what year F3 bearing you get some have a locating pin, some dont. Depending which of these you get, some will fit, some wont.
_________________
If I have to take the carbs off once more...