Different Commando front master cylinder sleeve kit, how many variations?

concours

concours

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Just trying to get a clear idea of how many different ones, benefits, drawbacks, availability, etc.

Different Commando front master cylinder sleeve kit, how many variations?
 
I do my own, I make an alloy sleeve as per Don Penders and then bore to the dia I want, 12.7mm, 12 and 11 are possibilities. Then I get seals to suit the diameter with their rod so then I can measure the inner diameter the seal sits on. Then using the details on this site


I machine a plunger using all the different info.
 
There is the Andover Norton Pre Mk3 in 13mm bore:
andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
or the assembly:
andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
If you don't have machining skills or a lathe.
 
CanukNortonNut said:
There is the Andover Norton Pre Mk3 in 13mm bore:
andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
or the assembly:
andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
If you don't have machining skills or a lathe.
Click to expand...
Are repair parts available for them?
 
It's a little tough to tell from your picture, but that looks like one of the Al Miles sleeves. He does not usually sell direct, but a number of vendors carry his master cylinders on an exchange basis.
 
Ron L said:
It's a little tough to tell from your picture, but that looks like one of the Al Miles sleeves. He does not usually sell direct, but a number of vendors carry his master cylinders on an exchange basis.
Click to expand...
It is. I did not buy it direct. I sent my master to Morrie's Place, several years ago, and they did a great job doing the modification. I started by calling Morrie's, they explained Al Miles will not sell any repair parts for the modified master. They have asked him.
I contacted Al, and he refused to sell me replacement rubbers.
Not a good business plan, in my opinion.

YES, I can disassemble it, (AGAIN) and reverse engineer it, and find rubbers SOMEWHERE, but every minute of my time (sorry kids, NOT retired yet!) I waste on this, further solidifies my resolve.

To be clear, I was happy to keep my visually vintage master, and get more brake power.

GREAT IDEA.
 
Last edited:
I made my own. I did not like the idea of threading the inside of the cylinder. It is sleeved to 12mm with a piston made similar to the original but with a shimmed thrust pad that engages with the lever. Not suitable with a ribbed Metzler tyre [ don't ask ], but perfect with the 400x19 TT100.
 


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