Great Plains Logo


Advanced Search

Select the Category


you would like to browse:


Home



520
Primo Belt Drive
8MM Open
Open primary for 74" & 80" 8mm. These units were
designed for competitive use or big inch street motors.
Note: All 2" and 3" belt drive units fit adjustable
transmission bikes only.
VT No. Fits
Width Replacement Belt
20-0040 1937-54 2" 20-0104
20-0041 1955-84 2" 20-0104
20-0042 1937-54 3" 20-0105
20-0043 1955-84 3" 20-0105
8MM Kickstart
Open Or Closed Primary. Kick start only (8mm) 1½" belt
type.
VT No. Fits
Replacement Belt
Note: All belts by Primo, Karata and BDL are manufactured by Gates Rubber.Belts for drives carry
no warranty of any kind, as sold either as individual replacements or complete drive kits.
11MM
Early Model Without Idler. Outer front pulley guides allow
100% belt-to-pulley contact for superior belt tracking. Idler
system not required as this unit is for models with adjustable
transmissions only, kickstart. 11mm x 1½" wide.
VT No. Fits
Replacement Belt
20-0052 1937-52 FL 20-0117
Tapered shaft Open/Closed primary
20-0053 1955-64 FL 20-0117
Splined shaft Open/Closed primary
Note: There is no warranty on belts sold as part of kit or indi-
vidual replacements.
20-0046 Installed
8MM Closed
Closed Primary for 74" and 80". Designed to fit inside pri-
mary cover. Increases horsepower, mileage and
quiets engine while retaining stock appearance. Closed
Primary. Kick start only 8mm. 1½" belt type.
VT No. Years Replacement Belt
Electric Start Models (8mm). 1½" Belt type.
20-0499* 1978-84 20-0102
*Note: For models with belt drive.
11MM
Primo 11mm Belt Drive Kits Late Model With Idler elimi-
nates excess belt movement during acceleration and deceler-
ation assuring smoother driveability. Measures 11mm x 1½"
wide.
VT No. Fits
Replacement Belt
20-0050 1965-84 FL-FX Kick start 20-0117
20-0051 1965-84 FL-FX Elec start 20-0117
Closed primary 4-Speed
20-0059 1979-84 FL-FX 5-Speed 20-0116
Electric Start
Primo 8mm “Brute Classic" and 11mm “Brute II" Belt Drive
and Pro Clutch Combination Kits feature 11/2 belt and
updated diaphragm spring operated clutch. For aluminum or tin
primary covers 1937-84 4-Speed Big Twins. Electric start units
are noted *. All other units are kickstart only.
8mm
Rep. Belt 11mm Rep. Belt Year/Type
20-0064 20-0102 20-0080 20-0117 1937-57 Tapered
20-0065 20-0102 20-0081 20-0117 1955-64 Splined
20-0066 20-0102 20-0082 20-0117 1965-77 Splined
20-0067 20-0102 20-0082 20-0117 1978-84 Splined
20-0068* 20-0100 20-0083* 20-0117 1965-78 Splined
20-0069* 20-0102 20-0083* 20-0117 1979-84 Splined
—
1979-84 Splined
w/Rear Belt Drive
—
Repl. Clutch Pak
for Above Drives
Brute Classics