Yep. That old nutshell again 
At the last MOT (by not the usual tester) the tester was considering failing my 80ST for 'variation of braking effort' for both front and rear brakes.
A bit of a discussion was then had with me asking the tester why was he trying to test the brakes of a 36 year old design to modern standards with modern equipment - rollers etc.
Yes we all want good brakes, but they are how they were designed.
Bit like applying 17th edition wiring regulations to a domestic property built in the '50s and expecting it to pass. Again we all want a safe house, but unless you upgrade it will not comply with modern regs.
So, the discussion was ended by me telling the tester to ride the bike. He came back agreeing that although the brakes were what they are, the instrument needles on the rolling road were hugely magnifying what could be actually felt.
So, got the pass.
But it got me thinking:
Carefully inspecting the front disc showed up lines or ridges on the surface. Thats reasonably easily sorted by replacing the disc and pads and re-filling the fluid with fresh DOT4.
But what about the rear, and this is the point of this long ramble.
Presumably there will be some ovality in the hub from spoke tension etc, etc.
Can anybody recommend a motor engineer that could turn out the steel brake liner 'round'. Would need a lathe with a throw, or removable gap bed to accomodate the 18" rim. This work must be done on classic/vintage cars with brake drums in the wheel hub.
There is a max dimension cast into the alloy of the hub and probably quoted in Haynes, Clymer etc.
Depending on the ovality and how much needs to be removed, ie the actual finished diameter, over sized linings could probably be fitted.
Anybody gone down this route?
At the last MOT (by not the usual tester) the tester was considering failing my 80ST for 'variation of braking effort' for both front and rear brakes.
A bit of a discussion was then had with me asking the tester why was he trying to test the brakes of a 36 year old design to modern standards with modern equipment - rollers etc.
Yes we all want good brakes, but they are how they were designed.
Bit like applying 17th edition wiring regulations to a domestic property built in the '50s and expecting it to pass. Again we all want a safe house, but unless you upgrade it will not comply with modern regs.
So, the discussion was ended by me telling the tester to ride the bike. He came back agreeing that although the brakes were what they are, the instrument needles on the rolling road were hugely magnifying what could be actually felt.
So, got the pass.
But it got me thinking:
Carefully inspecting the front disc showed up lines or ridges on the surface. Thats reasonably easily sorted by replacing the disc and pads and re-filling the fluid with fresh DOT4.
But what about the rear, and this is the point of this long ramble.
Presumably there will be some ovality in the hub from spoke tension etc, etc.
Can anybody recommend a motor engineer that could turn out the steel brake liner 'round'. Would need a lathe with a throw, or removable gap bed to accomodate the 18" rim. This work must be done on classic/vintage cars with brake drums in the wheel hub.
There is a max dimension cast into the alloy of the hub and probably quoted in Haynes, Clymer etc.
Depending on the ovality and how much needs to be removed, ie the actual finished diameter, over sized linings could probably be fitted.
Anybody gone down this route?
