100-6 Brake Master Cylinder Bore

[prb51]

For a BN6 with drums all around, should the bore be .625 or .75? I've seen both listed. This is for a later BN6 with the remote can reservoir.
It appears this often causes issues when ordering etc.... I believe the later BN6, like mine, used the .625 as did the early BN7's....some sites say use it only for the clutch others say clutch or brake??

 

[red57]

Discs in front = 5/8" master, Drums all round = 3/4" master. Your BN6 with drums should be 3/4". Remote vs integral reservoir has doesn't matter, it's the volume of fluid needed for those extra wheel cylinders that requires the larger bore master. Some folks compromise pedal effort vs pedal travel and use a .070 master but that's not stock.

 

[prb51]

darn.... guess I better get busy then. My mistake for taking the MOSS catalogue as correct then...they have both listed as correct for the BN6...the last .75 I got from them would not hold a bench bleed....junk.

 

[red57]

I suggest you get genuine Girling from someone like Pegasus Auto Racing Parts. They cost a lot more money but With Moss, you never know where they are from or who made them.

 

[prb51]

Autofarm sells Brit made stuff but would you have any idea what would work/fit with the hard fluid lines already in the BN6 from that site...mixing and matching can be a pita. I don't want to have to change out the hard lines.

 

[prb51]

Any idea if the stock in/out tube fittings are the same.... I would rather buy a name brand anyway

Girling Remote Reservoir Master Cylinder - Pegasus Auto Racing Supplies

Girling remote-reservoir Master Cylinders can be used for brake or clutch. These are Brand-New, Genuine Girling units. Only the real thing has GIRLING on the side!

www.pegasusautoracing.com

Thanks for the link...yes, those are the same fittings and dimensions so I'll order one tomorrow.