520
Big Twin Cylinder Base Studs
feature heat treating and interfer-
ence thread at cylinder base. Sets
of eight.
VT No. OEM
Fits
8856-8 16831-30 1930-77
12-2100 16831-30 1930-77
8857-8 16837-78 1977-84
12-2100
Pan-Shovelhead Cylinder and Piston Kit
Shovelhead 3⁵⁄₈” Big Bore Metal Cylinder Base Gasket has
a steel base metal which has been coated on both sides with a
specially formulated high temperature oil resistant rubber com-
pound. Silicone beading around the inner and outer perimeter
forms a seal on both sides of gasket. Sold in pairs.
V-Twin James Fits
—
15-1123 .032” thick
15-1532 15-1122 .020” thick
Replacement Cylinders Only
for stock bore, stock stroke
and compression. Must be
honed to standard size for
proper fit. Sold each without
piston.
S&S Cast Iron Cylinders
for Shovelheads are stock
length and include base
nuts, head bolts, head and
base gaskets.
VT No. Size Fits
11-0062 3⁷⁄₁₆” 1966-78 74”
11-0063 3¹⁄₂” 1978-84 80”
Over 50,000 Pieces Served Since 1978!
11-2603
Cylinder and Piston Kits are honed and pre-fitted with 8.5:1
stock compression pistons and Hastings rings. They are ready
to run and require break-in as suggested in the appropriate
shop manual. Sold in pairs for stock stroke only. Order gasket
set separately.
VT No. Years
Compression Ratio
Piston
Panhead 74”
11-0885 1948-52
8.5:1
Cast
11-2602 1948-65
8.5:1
Cast
Shovelhead 74”
11-2603 1966-78
8.5:1
Cast
Shovelhead 80”1979-85
11-2604 Replica
8:1
Cast
11-2612 GME
8:1
Cast
11-2613 GME/Wiseco
9.5:1
Forged
11-2614 GME/Wiseco
7:1
Forged
11-0885
11-0885
8104-16
Cylinder Base Nut
Big Twin 1936-85 Cylinder Base Nuts and Washers, 8 piece sets.
VT No.
# Year
Finish
Style
7017-16 A 1936-77
Chrome
Acorn
7813-8
B 1978-84
Chrome Milled Hex Acorn
8600-8
C 1966-84
Chrome
Big Bore
8601-8
C 1966-84
Black Oxide
Big Bore
8437-16 D 1936-77
Chrome
Cap
8474-8
E 1978-84
Chrome Milled Hex Cap
8104-16 F 1936-78
Chrome
Hex
8105-16 F As above
Cadmium
Hex
8105-16T F As above
Cadmium
Hex
9623-16 F As above
Parkerized
Hex
9100-8
G 1978-84 80” Shovel Chrome
Hex
9101-8
G As above
Cadmium
Hex
9102-8
G As above
Black Oxide
Hex
8860-8 H
Cylinder Base Spacer Chrome
1978-84 Shovelhead
8861-8
H As Above
Black
9715-8 I ⁷⁄₁₆” Lockwashers
Chrome
8171-8 I ⁷⁄₁₆” Lockwashers
Cadmium
9716-8 I ⁷⁄₁₆” Lockwashers
Parkerized
7813-8
A
B C
D
E
F
I
H
G
7017-16
VT No. OEM
Type
1948-52 74”
11-1283 —
Front
11-1284 — Rear
1948-65 Panhead 74”
11-0502 16485-48 Front
11-0503 16494-48 Rear
1966-78 Shovelhead 74”
11-0500 16484-66 Front
11-0501 16492-66 Rear
1979-85 80”
11-0496 16498-80A Front
11-0497 16499-80A Rear
11-0481 GME
Front
11-0474 GME
Rear
Note: The use of Colony 12 point head bolts 8714-20 chrome
or 8618-20 black and cylinder base nuts 8600-8 in chrome or
8601-8 in black will allow extra clearance for tightening when
necessary on 1948-84 Big Twin cylinders.