A special varnish to protect the interior of the fuel tank. Grey colour.
Number in the catalog: 3850
In the spare-parts catalogue of Zündapp KS 750 from the 6th of June 1942 (with changes from 1st of November 1943), on the page 81, table 23, which concerns the foot-rests and the saddle of the passenger, there is an information that the rubber covering of the saddle was made by companies Drilastic or Framo.
The additional blockade of the Sperre lever. Catalougue no. 1106-1
The felt air filter BMW R75. Catalogue no. 2030