XR7502 - 72/74 XR750 RACE SEAT

Harley XR750 TT road race seat
The original factory race seat.

XR7504 - 72/74 (LONG CIRCUT)DISC BRAKE FAIR

HarleyXR750 fairing long circuit - disc brake
The three piece design pictured was obtained from Rob Ianucci of Team Obsolete; the molds were taken off of original, unmounted Harley Davidson parts.
Two different versions are available. The lowers are similar, but the upper differs depending on whether the bike is a drum or disc brake unit.
The disc brake version of this fairing has a much smaller and shorter dash area to make room for the massive brake master cylinder mounted on the handlebars, shown in the pictures below.