1975 R90s frame with Kosman subframe. R100S engine. Steffano designed Full Floating linkage monoshock rear suspension. Large tube diameter BMW K100 front end assembly. Kosman front wheel hub and Bladerunner floating rotor. Kosman built wheels. Torazzi rearsets. Original bodywork by master metalsmith and long time Kosman contractor Evan Wilcox. Body design by Evan Wilcox and Robert Steffano. Subframe fabrication by 15 year Kosman employee Jeff Piehl.