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481
CLASSIC
V-Twin Replica Case Set
V-Twin “Shop Ready” Replica Case Sets and Replacement 
Let Hand Cases 
for Big Twins feature left side number boss 
which is left blank. The 1948‑54 case set used stock type loose 
rollers on both pinion and sprocket shaft and the 1956‑69 case 
sets use a Timken bearing on the sprocket shaft and loose 
rollers on the pinion shaft side. Both the case sets and left hand 
only cases are slightly thicker than stock for added strength.
VT No.   Item 
Fits
10-0954  Case Set 
1948‑54
10-0955* Case Set 
Custom
10-0294  Case Set 
1958‑62
10-0843  Left Case Only 
1948‑54
10-0345  Left Case Only 
1948‑54
10-0937  Left Case Only 
1955‑64
10-0938  Left Case Only 
1965‑69
*Note: 10‑0955 case set is drilled and tapped for overhead oil 
line. Allows use of Shovelhead or 1963‑64 Panhead top ends to 
be used. Includes Timken bearing for left side.
Welch Plug 
for Early 
Cases, 
pack.
10-0937
10-0938
10-0954
Timing Plugs are available in stock size ⁵⁄₈ — 18 thread 
unless noted as oversize (O.S) which is ¹¹⁄₁₆ — 16 
thread.
A. Acorn style plug fits all models Big Twin models tim‑
ing plug holes and oil tanks.
VT No. 
Type
7106-1  
Chrome
B. Acorn style plug with oversize thread and one tap for rethreading stripped out 
timing hole. Fits all timing holes. 
VT No. 
Type
7500-2 
Plug and Tap (Oversize)
7501-1 
Plug Only (Oversize)
9407-1 
¹¹⁄₁₆
”—16 Tap (Oversize)
C. Stock timing plug.
8114-1 
Chrome
8115-1 Cadmium
9404-1 
Cadmium (Oversize)
9714-1 
Parkerized (Oversize)
9504-1 
Parkerized as above, ⁷⁄₈” Hex
9503-1 
As above cadmium
D. Functional and custom design plug fits all Big Twin 
models and Sportster timing plug holes and oil tanks.
8610-1 Chrome
8611-1 Cadmium
E. Allen style plug use on all 1970‑up replaces 720.
9402-1 Chrome
9403-1 Cadmium
9960-1 
Chrome (Oversize)
Timing Plugs
A
C
D
E
B
A
E
8610-1
9402-1
B
7500-2
Generator and 
Relay Mounts
Right Side 
Timing Cavity
OE Style Number 
Boss Detail!
Components are: 
• Cam Bushing or Bearing
• Left Case Race or Timken      
 Assembly
• Idler Gear Stud
• Circuit Breaker Stud
• Oil Pump Drive Bushing
• Right Case Bushing
• Cylinder Base Studs
• Dowel Pins
• Case Bolt Set
• Tappet Oil Screen
• Breather Tube
• Drain and Timing Plug
C
10-0955
D
10-0345
VT No.  Size
12-0599 ¹⁄₂” Welch Plug
12-0595 ⁹⁄₁₆” Welch Plug
12-0596 ³⁄₈” Welch Plug
12-0623 .619 Welch Plug
12-1166 Timing Cover Pin
10-0843