Front master cylinder bore size

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mike209
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Front master cylinder bore size

Post by mike209 »

What is the limit on front master cylinder bore, I had cylinder with stuck piston so I milled it out and honed cylinder, I had to open it up to .631 to remove all the corrosion, is .006 over too much?

EMS
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Re: Front master cylinder bore size

Post by EMS »

mike209 wrote:What is the limit on front master cylinder bore, I had cylinder with stuck piston so I milled it out and honed cylinder, I had to open it up to .631 to remove all the corrosion, is .006 over too much?
According to the service manual, the limit is 15.925mm or 0.6270 inches ID. This would make 0.631 too much.

mike209
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Re: Front master cylinder bore size

Post by mike209 »

Thanks EMS, I tried to save it but was too corroded, now I have to hunt for good one

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NobleHops
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Re: Front master cylinder bore size

Post by NobleHops »

mike209 wrote:Thanks EMS, I tried to save it but was too corroded, now I have to hunt for good one

There is a place not far from you called Apple Hydraulics that can resleeve yours. They did mine, and it was perfect and will be for eternity, but they nicked up the MC a lot in the process. Alternatively, you could prowl eBay for something like this, which is cheaper than a rebuild kit!

http://www.ebay.com/itm/Hydraulic-Twin- ... d8&vxp=mtr

P.S. If you do, I'll buy your rebuild kit :-)
Nils Menten
Tucson, Arizona, USA '80 CBX, sort-of restored :-)

mike209
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Re: Front master cylinder bore size

Post by mike209 »

Nils, just checked their website, they are asking $95, I think I will take my chance and resleeve it myself,at work I have access to all machinery and tooling necessary for that job, will post result here when done

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NobleHops
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Re: Front master cylinder bore size

Post by NobleHops »

mike209 wrote:Nils, just checked their website, they are asking $95, I think I will take my chance and resleeve it myself,at work I have access to all machinery and tooling necessary for that job, will post result here when done

Oh REALLY MIke? :-) :-) :-) Super interesting.

How would you like to tool up and do a bunch at the same time?

Lemme go hunt up my thread from when I had this done, I think I have some photos and notes that you might find useful.
Nils Menten
Tucson, Arizona, USA '80 CBX, sort-of restored :-)

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NobleHops
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Re: Front master cylinder bore size

Post by NobleHops »

Here you go:

viewtopic.php?f=50&t=6393&p=47785&hilit=resleeve#p47785

What I should have said prior was "How would you like to tool up and do a bunch at the same time for fun and profit?"

I think you'd have a few takers if you did.

N.
Nils Menten
Tucson, Arizona, USA '80 CBX, sort-of restored :-)

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