36-52 Flathead, 36-47 Knucklehead, 48-54 Panhead
Note: For Kick Start Models only.
Manufacturer: BDL, 505 W. Lambert Rd., Brea, Ca 92821, 92821 Brea, Ca , United States of America, https://beltdrives.com
Responsible person in the EU: Custom Chrome Europe GmbH, Carl-von-Ossietzky-Str. 8, 55459 Grolsheim, Germany, https://www.custom-chrome-europe.com, info@customchrome.de
For precision belt adjustment, kits for aluminum-primary Big Twins include a BDL idler that makes sure belt tension is correct (tin primary models use tranny adjustment for correct belt tension). All kits use 31-tooth engine pulleys and 47-tooth clutch pulleys.