Brakes Front and Rear- only for 1972
The
front brake on the 1972 GT has a Lockheed CP2195 two piston alloy
caliper gripping an extremely heavy 276mm solid cast iron disc.
The caliper, which was considered light weight in its day weighs in at
1075 grams ( approx. 2 pounds 6 ounces ) with half worn pads. The disc
tips the scales at..........( my scale only weighs up to 2kg and it
broke that easily ! )
The inner part of the front disc rotor was originally painted silver, not black.
The rear brake
assy doesn't weigh a lot less when you include the hub, drum, shoes and
actuating arm. It is however of the conventional single leading shoe
type and a handy stopper in a pinch.
The rear brake torque arm is chromed held at the drum end with a castellated nut and split pin. Rear brake cable locknut behind the knurled adjuster is a 7mm thread.
Click on the rear brake image for a better view of the lever adjuster assy.
Front Master Cylinder
The front master
cylinder fitted is the Lockheed CP2215 which provided very little feel
and requires a heavy hand to produce an effect better than simply
impeding progress.
The
anodised finish on these components is original, the colour true to
life. The master cylinder was fitted with a boot on the brake line
outlet.
Rear Brake Actuating Lever
The rear brake
lever pivots off the left hand footpeg mount. A spring wrapped around
the lever and the shaft, provides the return. Two circlips are fitted
to the end of the shaft to retain the lever assy.
Fitting Dual Disc Brakes
In an effort ( sic ) to increase the braking effect, some owners have fitted dual discs.
To achieve this you will require
1 x solid disc
1 x right side Lockheed CP2195/12/13 caliper ( good luck finding one of these )
1 x angled Veglia speedo drive
1 x custom
master cylinder end bolt drilled to take an extra line, or a custom
made brake line splitter and brake lines to suit whichever method you
choose.
4 x brake disc mounting bolts from a later dual disc model bike.
Note :
1. Consider if
you have original handlebars there isn't sufficient room to add a
longer outlet bolt and that if a splitter is to be used it must be
located somewhere, probably on the lower triple tree.
2.You will also
require the master cylinder to be sleeved down to a suitable size to
provide effective lever effort and response.
3. With the
extra unsprung weight and improved braking force, the damping of the
forks will require modification. Gold Valve Emulators can be adapted to
compensate.
The original
three fin Lockheed calipers and master cylinder have been reproduced by
Lockheed following the disastrous fire at the British Motorcycle
Museum, however the logo has changed.
Below
are images of the original 3 fin calipers in both left and right
configuration. Click on the image for a close up view of the caliper
part numbers which are cast in near the mounting bolt hole.
