I am currently restoring a 1965 T100SR. My concept of restoration is not "as it left the factory" but rather "it looks original from 20 feet but incorporates improvements wherever possible"
I wanted to convert the forks on this bike to the later shuttle valve internals.
I referenced the following parts lists
#6 (1965),SPC2 (1968),SPC8 (1969),56-00290 (1970),99-0902 (1970)and 99-0903-2 (1970).
To anyone contemplating doing this here are the details:
First the good news---things that dont need to change:
a) Bottom members (H1842/3--97-1842/3)
b) Cork washer (F4047-82-4047)
c) Spring abutment (H1657--97-1657)
d) Gaiter (H1645-97-1645) but can use the later 97-3635.
e) Spring (H1891--97-1891)
f) Plain washer (H1656--97-1656)
g) Oil seal (H1500--97-1500)
h) Dust excluder(H1654--97-1654)
i) Plain washer (H431--97-0431)
j) Top bush (H441--97-0441)
k) Damping sleeve (H1896--97-1896)
l) Lower bearing (H443--97-0443)
m) Aluminum washer (H1062--97-1062)
Now it gets more expensive! The parts needing to be changed are:
a) Stanchions (H3904--97-3904) the hole drilling is completely different from the original (H1890--97-1890)and the threads at each end are changed from 1 1/16" 26 tpi in the original to 1 1/16" 28 tpi on the stanchions with the drillings for the shuttle valve operation.
b) Cap nuts (H2245--97-2245) (changed thread to fit the new stanchions)
c) Bearing nut (H2091--97-2091)(different design to accomodate the shuttle valve and different thread to fit the new stanchion).
d) Restrictor (H2090--97-2090) Different smaller shape to fit inside the shuttle valve. Also different internal thread---1/4" 28 tpi compared with 5/16" 22 tpi on original
e) Flanged bolt (H2126--97-2126). To match the restrictor thread.
f) Shuttle valve (H2154--97-2154) Not present on original.
g) Circlip (H2127--97-2127) Not present on original.
BTW I am fitting Progressive springs and Stat-O-Seals (Dowty washers to the Brits) instead of the aluminum washers.
Hope this work may be useful to anyone contemplating a similar conversion.