Richard (Rick) Losh, did the pinstripes. The Dunkel Blue parts have red and white stripes, with the exception of the upper side panels that have a single red stripe. The seat cowl in Scheme Code 130 was painted Dunkel Blue, but I choose to use Hell Silver with a single white pinstripe. Here is a short video showing Rick applying the pinstripes.

VIDEO: 1983 BMW R100RS Rick Losh Painting Pinstripes

And some pictures of the final product.