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Rear master cylinder

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brodsord:
Hi everyone,
I have a cb750f2 build on the go at the moment,
Bought as a rolling frame and a box of bits. Been slowly putting her back together and one of the scores of bits missing was rear master cylinder.
Managed to find one in the states needing overhaul.
I’ve drilled the old piston out but managed to balls it all up by drilling the first part of the cylinder to wide so piston rubber has to much play.
Has anyone got any solutions for this problem?
Is it possible to get the cylinder bored out slightly bigger then a new sleeve inserted and welded at that the top ?
Thanks


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Bryanj:
Technicaly yes, practicaly i think it would be incredibly expensive. On a CBX 550 i had i managed to fit one of the £10 ish rear scooter ones you see on ebay by using a smsll adaptor plate, worked fine. 372872030569 is one ebay number

brodsord:

--- Quote from: Bryanj on January 11, 2020, 09:24:29 PM ---Technicaly yes, practicaly i think it would be incredibly expensive. On a CBX 550 i had i managed to fit one of the £10 ish rear scooter ones you see on ebay by using a smsll adaptor plate, worked fine.

--- End quote ---
It is pal, there’s a new unit on eBay at present in Germany for just under £400 just can’t justify spending that so may go just fit one of the cheap Chinese copy’s, I’ve got a couple here just need to make a bracket as you mentioned.
Thanks


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kettle738:

Send a photo of the unit and the damage to past parts   http://www.pastparts.co.uk/

They bore out and re sleeve master cylinders in stainless steel and return them with the original bore size, so depending on where and what the damage is, it might not matter.....you have nothing to lose by asking.

Incidentally, the price to re sleeve my XS2 master cylinder was £45 plus Vat and return postage.

Mick.

brodsord:

--- Quote from: kettle738 on January 14, 2020, 08:55:30 PM ---
Send a photo of the unit and the damage to past parts   http://www.pastparts.co.uk/

They bore out and re sleeve master cylinders in stainless steel and return them with the original bore size, so depending on where and what the damage is, it might not matter.....you have nothing to lose by asking.

Incidentally, the price to re sleeve my XS2 master cylinder was £45 plus Vat and return postage.

Mick.

--- End quote ---
Mick that’s fantastic I’ll check them out now, thanks so much


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