499
CLASSIC
V-Twin Motor Shop Cam Chest Kit includes internal Big Twin
replacement type parts for years listed including a Sifton
TM
cam.
Order cam bearings and bushing kit separately.
VT No. Fits
Model
10-0629 1936-47 OHV Knucklehead
10-0578 1936-47 OHV Lightning
10-0626 1948-57
Panhead
10-0676 1958-64
Panhead-Shovelhead
10-0627 1965-69
Panhead-Shovelhead
10-0660 1970-84
Big Twin Shovelhead
10-0627
Circuit Breaker Drive and Idler Gear fit 1936-69 Big Twins.
Order shims separately to fit. Available as lightning with holes
or solid.
*Note for high lift cams.
VT No.
OEM
Type
Style
12-1388
25775-36 Idler S&S
12-1397
25775-36 Idler Solid
12-1393
25775-36 Idler Lightning
12-1491 Sifton
Idler Lightning
12-1492 Sifton
Idler Solid
12-1396
25850-36A Drive Solid
12-1995* 25850-36B Drive Solid
12-1479
25850-36 Drive Lightning
12-1389* 25850-36 Drive S&S
Shims Thickness
10-4221 .050”
10-4223 .058”
10-4224 .062”
10-4225 .066”
12-1379
10-0660
12-1479
12-1393
12-1995
Idler and Circuit Breaker Drive Gear Shafts Kits.
Sifton
VT No. Item
10-1292 10-0803 Idler Shaft Kit
contains an idler shaft and a bushing, fits
1941-69 Big Twin Over Head Valve
10-1293 10-0804 Circuit Breaker Shaft Kit contains one shaft
and two bushings, fits 1941-69 Big Twin
Over Head Valve
10-0803
10-0804
1936-53
OHV BT
24010-39
1954-77
OHV BT
24010-54
Size/
Color
OEM
1977-89
OHV
Big Twin
Size/
Color
12-1399*
—
Standard
—
—
12-1379*
Standard
—
—
12-1268
Orange
12-9938
Orange
—
—
Black
12-9943
White
—
—
Red
12-9945
Yellow
—
—
Blue
12-9940
Red
—
—
Green
12-9941
Blue
12-1265
12-1273
White
12-9942
Green
—
—
Brown
12-9939
Black
—
12-1275
Yellow
—
12-1399
Pinion Shaft Gears. Orange is
the largest, yellow is the small-
est on 1936-77. For 1977-89
orange is largest, black is small-
est. *denotes OEM type
Reverse Rotation Circuit Breaker Drive Gear and Timer
Gear. Counterclockwise rotation gears allow use of dual fire late
type ignition to be installed in timer housing.
VT No. Item
12-1497 Circuit Breaker Gear
12-1498 Timer Gear with pin
12-0825 Gear Kit
12-1497
12-1498
12-1491
12-1492
Cam Shaft Gear
Idler and Circuit Breaker Kit.
VT No. Year
Type
10-1294 1936-58 Circuit Breaker
10-1295 1959-69 Circuit Breaker
10-1296 1941-69 Idler
10-0878 1936-69 Idler Gear Stud Kit
10-1294
10-1295
10-1296
10-0878
12-0825
12-1396
10-0629
10-0578
10-0626