Breather Gears
Thrust Washer Set, Breather Valve for 1950-78 BT. 4 steel, one
of each: 110, .115, .120, .125
VT No. Price
12-1509
$25.00
12-1538
Sifton™ 1948-77 Breather
Gear Kit
is constructed of
precision ground steel with
screen installed. 8 piece
steel thrustwasher set
included.
VT No. Price
12-1538
N/A
12-1534 12-1531
B-Stock Plastic Breather Valves.
VT No. Price OEM Year
12-1534
N/A 25310-71A 1970-E77
12-1531
$22.00 25310-82A L1977-99
C-Thrust Washer Set, Breather
Valve for 1950-99 BT includes one
of each size noted.
VT No. Price Fits Set
12-1510
$24.00 1979-82 8 Steel
    .110, .115, .120, .125
    .130, .135, .140, .145
12-1530
$27.00 1982-99 8 Plastic
    .130, .135, .140, .145
    .150, .155, .160, .165
12-1510
12-9967 12-9907 12-1509
A-Big Twin Steel Breather Valve is a machined breather valve
and gear. Designed to replace the stock steel or plastic units.
Order 8-piece thrust washers separately. Available in stock
duration only with either STD or +.030 O/S outside dimension.
VT No. Price Years Size Brand
12-9967
$139.00 1936-47 STD S&S
12-9968
$159.00 1936-47 +.030 S&S
12-9907*
$143.00 1948-77 STD S&S
12-1536**
$84.00 1948-77 STD Sifton
12-9956*
$143.00 1948-77 +.030 S&S
12-9906
$122.00 1978-99 STD S&S  
12-1537
$67.00 1978-99 STD Sifton  
12-9957
$125.00 1978-99 +.030 S&S  
12-9909
$44.00 All Washer Set S&S
12-9978
N/A All Washer Set Sifton
12-9909
$44.00 All Washer Set S&S
12-9978
N/A All Washer Set Sifton
*Note: Must be used with 1954-77 Pinion & Cam Gears.
**Note: Must be used with late 1979-82 type thrustwashers only.
12-1945 Sifton Air Ramp fits S&S/Sifton Breather Gear on 1936-99 models to remove more air and oil from crankcase. Requires removal of screen for installation. Gear not included.
12-1945
VT No. Price
12-1945
$40.00
Breather Parts
12-0101 12-0102
12-1514,12-1448,12-1528,12-9908,12-1513 12-9908
Big Twin Pinion Parts. Kit is complete with proper parts.
VT No. Price Fits Kit
12-0101
$30.00 1936-53 5 pc. Kit
12-0102
$28.00 1955-69 4 pc. Kit
Pinion Shaft Seal Ring is used on all 1940-53 OHV Big Twins,
sold each. Replaces 24697-40.
VT No. Price
12-1525
$18.00
Primary Breather Tubes for Big Twin models.
VT No. Price # OEM Years Item
12-1514
$28.00 A 24912-48 1948-57 Tube
12-1448
$40.00 A 29411-36 1936-47 Tube
12-1528
$24.00 B 24918-64 1936-57 Snoot
12-9908*
$54.00 C Kit 1958-64 All
12-1513
$18.00 D 24918-58 1958-64 Rubber Nipple
40-0547
$26.00 E 24912-65 1965-66 Tube with Nut
40-0548
$28.00 F 24913-67 1967 Tube with Nut
12-1191
$18.00   24914-58 1958-64 Stud Only
*Note: Includes 24925-58 spacer, 24914-58 stud, 24922-58
collar, 24923-58 cap and 24918-58 rubber ripple.
42-0011 42-0041
Chrome Oil Pump
Covers
mount onto
the existing bolts on
Big Twin models
VT No. Price Years
42-0041
$16.00 1970-84
w/chain oiler fitting
42-0011
$21.00 1980-91
12-1517,12-1518
Breather Screens and Separator in
five packs
fits 1936-69 BT.
VT No. Price OEM Item
12-1517
$20.00 25275-36 Screen
12-1518
$20.00 25279-36 Separator
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