544-700/C rigid frame, Triumph 6/750, +8% rake, HD neck
544-700/D rigid frame, Triumph 6/750, std rake, HD neck

The above are intended to use the chrome HD removable steering head bearing adaptors which receive Timken bearing cups and cones. Everything for HD but 45 and early Sportster forks will drop right on.

Harley Davidson part #s for taper bearings to run our BCS frames with HD necks with forks from ALL 1948 UP FL, 1971 UP FX, 1982 UP ALL XL are as follows:

2) CUP  (HD 48315-48 OR HD 48311-60) WITH RACES INSTALLED;
2) CONES (HD 48300-60) AS USED ON 1948-85 FX & FL, 1981-85 XL
1) DUSTCOVER, TOP ( HD 48361-80)
1) DUSTCOVER, BOT (HD 48365-48/A)