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1252
VT No. 8623-2
VT No. 31-0177
VT No. 31-0198
VT No. 31-0407
VT No. 31-0408
Auxiliary Spring Assembly Kits Are Used With Seat Tee 
Bars for All Buddy and Police Size Solos.
Chrome Frame Cover include hardware as 
for Big Twin frames.
VT No.  Year 
 Type
42-1375  1958-64   Swing Arm
31-9982  1958-80   Frame Cross Stud
Auxiliary Seat Spring
Auxiliary Spring Assembly includes parts pictured for 1936-
57 Big Twin rigid frame. Order the Spring Clip Kit and spring 
hook separately.
VT No.  OEM 
Item
31-3999  52560-36  Complete Assembly,1936-57 Big Twin
31-4061  Chrome 
Complete Assembly, 1936-57 Big Twin
13-9198  52575-33  Spring, Chrome, pair
13-9209  52575-33  Spring, Black, pair
31-3997  52581-36  Support Bracket
31-3996  52592-36  U Clamp, pair
49-1157  13330-36A  Mount Stud Hex Type, Parkerized, pair
31-3995  52603-36  Mount Stud Round Type, pair
31-0408  52588-38  Yoke Hook Set
 
73341-36 1936-57
31-0198  52586-36  Yoke Hook, Chrome
31-0454  52586-36  As Above, Parkerized
31-3998 52567-36  Yoke
37-0862  7859 
Nut, Four Piece
49-0449   
Dome Cover Set
Auxiliary Spring Clip Kit 
includes 2 of each part listed 
52600-36, 52596-36, 52543-36, 
and bolts and wing nuts for clip-
ping spring yoke to bottom of 
buddy seats.
VT No. 31-3990
31-4061
42-1375
VT No. 
OEM 
Item
31-3973  52562-33 
Complete Assembly
includes yoke bar, chrome springs and clamp set.
13-9198  52575-33 
Chrome Springs
13-9209  52575-33 
Black Springs
31-3972  52579-41 
Frame Clamps, Four Piece
31-3958  52565-41 
Spring Yoke Bar
Order Related Parts Separately
31-0407
  52585-41 
Spring Hook
31-3990  52600-36 
Spring Clip Kit
49-0177  52652-29 
Rear Peg Set, Parkerized
27-1454   
Peg Yoke Set
31-3990
49-0177
13-9198
13-9209
45 Auxiliary Seat Spring Kit includes black finished parts 
with chrome springs. Order spring clip kit and spring hook 
separately.
Chrome Front Solo Seat Mount Kit. 
Fits 1986-up FXST.
VT No. 31-0819
Buddy Seat Hardware 
VT No.   OEM  
Item/Finish 
8623-2 
51918-29 
Clevis pin with Spring
31-0177   52551-36   Front Bracket, Cadmium
31-0198   52586-36   Spring Hook, Chrome 
31-0454  52586-36 
As above, Parkerized
31-0408  52588-38 
Spring Hook Set
 
52887-36 
1936-57, Parkerized
31-0407  52585-41 
1941-52, 45 Solo
31-0156   
3 hole Under Fender Mount Strip
31-1283   
Seat and Hook Only
Black Seat Post and T Kit fits 1936-52.
VT No. 31-0977
Seat T and Shock Piston Set.
VT No.   Finish
31-0965  
Chrome
31-1781  Black
54-0057 Bushing
31-0965
31-1781