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Primary Chain
Primary Chain Drive System
Primary Chain Drive Systems for Big Twins include 76 or 82 
link primary chain, chain shoe adjuster assembly, clutch drum 
basket with starter ring gear and steel and fiber clutch plates with 
pressure plate assembly. Correct front compensator sprocket 
assembly includes all parts necessary for installation, including 
sprocket nut. Big Twin 5 Speed Softail models and all pre1985 
FLH-FX 4-Speeds require 82 link primary chains; 1980-up FLT-
FXR 5-Speeds require 76 link primary chains.
82 Links  76 Links 
Year
18-0106*  18-0110* 1970-84
18-0107*        
1965-69
18-0108*        
1955-64
18-0117  
   —  
1955-64
18-0109  
   —  
1936-54
*Note: Units include compensator front sprocket assembly.
18-0106 1970-84 Type
Primary Hardware
Replica Primary 
Chain features 
Figure ‘8’ Side 
Plates for 
reduced weight 
on Early models!
Diamond Endless Primary Chains. 
VT No.  Size 
Fits 
19-0367  428 x 2 x 82  1936-64 Big Twin 74 and 80, Figure 8
19-0360  428 x 2 x 82  1965-84 Big Twin (Oval)
19-0392  428 x 2 x 80  Special Length
19-0363  35 x 3 x 92  1952-56 K-Model 
19-0364  35 x 2 x 96  1938-up Servi-Car 
19-0365  35 x 2 x 100  1929-52 Solo 
19-0366  428 x 2 x 88  1930-36 VL Side Car
19-0380  428 x 2 x 90  1930-36 VL Solo
19-0361  428 x 2 x 76  1974-06 FLT/FXR
Primary Chain Connector Links are sold each for 
size 428 x 2 chain. Fits all Big Twins.
VT No. 19-0377
19-0360
19-0367
19-0364
19-0363
TYK Brand Primary Chains.
VT No.   Links  Fits
19-0878
  76 
1979-06 FLT, 1982-94 FXR
19-0876  82 
1936-06 FL-FX
19-0877  82 
Nickel Plated
19-0934  82 
1936-64 FL, 1936-84 EL
19-0933  84 
1941-84 FL
19-0371  82 
1941-84 FL
19-0941  82 
1941-64 FL (York)
19-0845  82 
1965-84 Big Twin
19-0588   
1936-52 EL
19-0918  96 
1937-73 G
19-0876
19-0878
19-0877
19-0934
18-0963
1954-64 Rear Chain Oiler Kit for 1954-64 replaces 63591-
62 to fit on rear of inner primary cover. Kit includes screw. 
VT No. 
Item 
42-0653 
Rear Chain Oiler
40-0176 
Oil Fitting
40-9983 
Oil Drain 1936-57
40-9984 
Oil Drain 1958-64
42-0589 
Oil Guard
40-0835 
Drain Fitting
10-0835 
Oil Tank Fittings
42-0653
40-9983
40-9984
40-0835
18-0964
Chrome Primary Drive for 4-Speed Kick Start models includes 
chrome 24T motor sprocket, nut, clutch drum, chrome clutch 
springs, chrome pressure plate and chrome spring plate. Fits 
1941-84 FL and 1971-84 FX.
VT No.   Fits 
Shaft
18-0963  1955-84 Splined
18-0964 1941-54 Tapered
Rear Chain Oiler Fitting fits 1941-
69 FL, zinc. Fitting is positioned 
between the oil pressure gauge and 
oil pump fitting. 
VT No. 12-1280
19-0941