DC Linkert can be modified for improved mid-range/top end performance by boring the carb body to
accept the Linkert Model-74 (X-9) Throttle Disc. Most racers just bore the carb and throttle body "straight through" 1.500" . . . but, if you actually follow the Factory H-D Racing Manual instructions . . . it shows increasing the diameters from each end. On all my previous "bored" DC Linkerts - we just ran the boring bar straight through. This will be my first carburetor modified actually following the race-prep instructions. I also show you the drawing of how-to make your own float bowl spacer (which are cool) . . . H-D recommends you run a 1" aluminum spacer block.
Vintage performance up-grades - nothing better ! Following in the foot-steps of our racing legends, pictured on the walls of our shops and man caves . . . from the books and manuals of our racing libraries . . . only for the true gearhead in all of us . . .
NOTE: It doesn't make a difference which DC Linkert Sportster Carburetor you use for modification. The DC-10(pictured) is one of the later models. (However, the DC-7 was standard on 1966 FLH and is ok to modify for usage on a Sportster). The lower the number, DC-1, DC-3, DC-6, etc. - denotes earlier versions. I suggest running the No.4 Main Jet, which is pretty standard in all DC Linkert models.