The first oil tank was used on the "commando" and later the "R" which was later named the fastback tank.
The second oil tank started with the "S" and "roadster", it is named "S" or "central"
There are at least 3 variants of roadster tank.
A. early one is late 1970 is 06-1140 and
1.It has NO chain oiler tap off on the scavenge return line..
2. The breather connection tube on the baffle tower is slightly larger diameter than the later ones.
B. later tanks are:
71,72, 06-3090
73 06-3095
74 06-3975
75 06-3456
With casual inspection only, The only difference I could find, which was on dan's tank is the return scavenge line is shorter AND closer conforming to the tank. pix to follow..
In Dan's tank and in my stock of tanks many of them had the rear bracket broken off.
I'm assuming these are broken due to the tanks resonant vibration which I have seen and noted as a huge potential problem. Very often the soft little iso mounts are broken, especially the rear one.
Out of 9 tanks only one tank had the front bracket broken off.
I will be repairing them with new tabs welded on the tank.
Next
I will be installing new stiffer rubbers to raise the resonant frequency of the oil tank and it's mass to a higher frequency that hopefully might even put an end to breakage.
All these properties will later be checked for accuracy and edited if necessary.
