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Carburetor Model Identification & Specs for American Motorcycles

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This resource is  under development, ALL additions and corrections WELCOME, in fact its a MUST!!.
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Carbs used on competitor models are shown incase you come across one at a swap meet or auction. You can then compare nozzle, venturi, and hole sizes against the original specs for your Indian carb. This page is not (yet) intended as a rebuild or tuning resource – just serves as an identification and comparison guide. It mainly came about with me having to identify over thirty carbs in my parts pool  – hopefully it will help others too. Schebler Carburetors were manufactured in Indianapolis, Indiana, patent applied by the Wheeler-Schebler Company in Oct 1902.

Notes: Drill size numbers on two hole idle (Idle2) systems are annotated (fl)=flange (in)=intake, one hole idle (idel1) on the Deluxe models are plug number sizes.
 Schebler Models G, H, C, AM  – Carb ID numbers (ID #) are stamped on the upper body casting.

List excludes AMX 6 and AMX13 as used on some Indian racing specials.
<Above Left is picture of a rare AMX12 racing carb,, Above Right, a rarer AMX13

For H Series Only:  The sNozzle column is the size of number drill used for cleaning spray nozzle, The aValve column is used for size of leather air valve disc. (see photo of operation for a Model H)

Schebler Model G
ID #
Size”
Venturi “
aValve
Idle2 (fl)
Idle2 (in)
sNozzle

Make, model,year

Flange Type: 2 point flange and clamp type (Indian)

Harley Davidson
1926-28 Single
GX-1
1
3/4
n/a
#71
#50
n/a

Indian Prince
1926 21″
GX-2
1
3/4
n/a
#71
#50
n/a

Cleveland
1926
GX-3
1
11/16
n/a
#71
#50
n/a

Harley Davidson
1926-28 OHV 1cyl
GX-4
1
1-1 1/16
n/a
#71
#50
n/a

Indian Prince
1926 Sport
GX-5
1
7/8
n/a
#71
#50
n/a

Cleveland
1926-27
GX-6
1
9/16
n/a
#71
#50
n/a

Cleveland
1926 Four 45″
GX-7
1
11/16
n/a
#71
#50
n/a

Indian Prince
1927 21″
GX-8
1
15/16
n/a
#71
#50
n/a

Harley Davidson
1927-28 Single
GX-9
1
11/16
n/a
#71
#50
n/a

Indian Prince
1928 21″
GX-11
1
7/8
n/a
#71
#50
n/a

Schebler Model H

Flange Type:  3 point flange, clamp type, leather airvalve disc
For more info http://home.t-online.de/home/pravg/schebler.htm

Indian Twin 5hp
1907-08 Diamond
HX-26
3/4
n/a
1
n/a
n/a
??

Indian Twin 5hp
1909-11, 1915
HX-76
3/4
n/a
1
n/a
n/a
#55

Indian Single 4hp
1912-1915
HX-84
3/4
n/a
1
n/a
n/a
#55

Harley Davidson
1915-17 Single
HX-94
1
n/a
1
n/a
n/a
#55

Excelsior
1915-16 Twin
HX-104
1
n/a
1 3/8
n/a
n/a
#55

Indian Twin 7hp
1912-1915
HX-121
1
n/a
1 1/8
n/a
n/a
#51

Excelsior
1916-18 BigValve
HX-122
1¼
n/a
1¼
n/a
n/a
#53

Reading Standard
1916-24
HX-125
1
n/a
1
n/a
n/a
#53

Henderson J & H
1917-19 Four
HX-130
1
n/a
1 1/8
n/a
n/a
#54

Excelsior
1917-19 Twin
HX-138
1
n/a
1 1/8
n/a
n/a
#51

Indian PowerPlus
1920-24 72ci BV
HX-147
1
n/a
1 1/8
n/a
n/a
#51

Indian PowerPlus
1916-1919 61ci
HX-153
1
n/a
1 1/8
n/a
n/a
#51

Harley Davidson
1920-24 Sport
1919 opposed 2cy
HX-156
3/4
n/a
1
n/a
n/a
#57

Reading Standard
1917
HX-158

??

Indian Scout
1920-1923
HX-159
3/4
n/a
1
n/a
n/a
#51

Harley Davidson
1915-24 61″
HX-160
1
n/a
1 1/8
n/a
n/a
#55

Excelsior
1917-25 61″
HX-162
1
n/a
1 1/8
n/a
n/a
#51

Reading Standard
1921-24
HX-164
1¼
n/a
1¼
n/a
n/a
#53

Excelsior
1921-25 72″
HX-167
1¼
n/a
1¼
n/a
n/a
#53

??
HX-175

n/a
??
n/a
n/a
??

Indian Chief
1922-25 61″&74″
HX-180
1¼
n/a
1¼
n/a
n/a
#55

Harley Davidson
1921-25 74
HX-181
1¼
n/a
1¼
n/a
n/a
#50

Indian,P+,Std,Chief
1920-25 61,72,74″
HX-182
1¼
n/a
1¼
n/a
n/a
#51

Ace
1920-25 Four
HX-183
1
n/a
1 1/8
n/a
n/a
#51

Indian Prince
1924-1925
HX-184
3/4
n/a
1 1/8
n/a
n/a
#55

Indian Scout
1924-1925
HX-189
1
n/a
1 1/8
n/a
n/a
#55

Indian Scout
1926-?
HX-190
3/4
n/a
1
n/a
n/a
#55

Schebler Deluxe  Models A, B, (C with and without air horn) Carb ID numbers are stamped on body casting
Notes: The style of carb connection for the following carbs are all 3 point flange.
Most of these have 1/4″ gas nipples, some are 3/16. Throttle discs are numbered for idle chamfer degree,
be aware of this if swapping discs between carbs.

Schebler Deluxe
Make,model,year
ID #
Size “
Venturi  “
Idle1
Idle2 (fl)
Idle2 (in)
Air Bleed
Equiv

Excelsior
1912-25 74″
1926, 45″ Sport
DLX-8
1¼
15/16
(DL-13)
#4
….
….
….
DLX-27

Reading Standard
1921-1925 72″
DLX-9
1¼
15/16
(DL-13)
#4
….
….
#55

Indian Scout
1920-1926 37″
DLX-10
1
3/4
(DL -33)
….
#55
#55
#52
DLX-50

Indian PowerPlus
1916-1919 61″
DLX-11
1
7/8
(DL-15)
….
#65
#50
#55

Harley Davidson
1915-24 61″
DLX-12
1
7/8
(DL-15)
….
#71
#50
#55

Excelsior
1917-25 61″
1926-27 45″
DLX-13
1
7/8
(DL-15)
….
#71
#55
#52
DLX-27

Ace
1920-25 Four ’26?
DLX-16
1
3/4
(DL-33)

#71
#55
#55
DLX-52

Harley Davidson
1921-24 74″
DLX-20
1¼
15/16
(DL-13)
#5
….
….
#55

Indian Pplus/Chief
1920-24 72″ PPlus
1922-26 74″ Chief
DLX-21
1¼
15/16
#5
….
….
#55
DLX-14

Harley Davidson
1924-26 74″Racing
DLX-23
1¼
1 1/16
(DL-29A)
#5
….
….
#55

Indian
Daytona Racing
DLX-24
1¼
1 1/16
(DL-29A)
#5
….
….
#55

Ace
1926 Four
DLX-25
1
3/4
(DL-33)
….
#71
#50
#55
DLX-52

Indian Chief
1920-1925 61″
DLX-26
1¼
7/8
(DL-15)
#5
….
….
#55
DLX-4

Excelsior
1925-28 45″
DLX-27
1
13/16
(DL-13)
….
#71
#55
#52

Indian Big Chief
1927-29 74″
DLX-36
1¼
15/16
(DL-13)
….
#55
#55
….
DLX-37

Harley Davidson
1927 74″
DLX-38
1¼
7/8
(DL-14)
….
#65
#50
….

Indian Scout
1927 45″
DLX-40
1
13/16
(DL-40)
….
#55
#50
#52
DLX-50

Excelsior
1925-28 45″ Sport
DLX-41
1¼
15/16
(DL-13)
….
#65
#50
….

Harley Davidson
1928 74″
DLX-45
1¼
7/8
(DL-14)
….
#65
#50
….

Harley Davidson
1928 74″ Police
DLX-48
1¼
1 1/16
(DL-29)
….
#65
#50
….

Indian Scout
1928 37″ Scout
1928 37″ 101
DLX-50
1
13/16
(DL-40)
….
#55
#55
#52
DLX-63

Indian 101 Scout
1928 45″
DLX-51
1
3/4
(DL-33)
….
#55
#50
#52
DLX-64

Indian Ace
1928 Four
DLX-52
1
3/4
(DL-33)
….
#71
#55
#55

Harley Davidson
1928 74″ Racing
DLX-53
1¼
1 1/16
(DL-29A)
….
#65
#50
….

Cleveland
1928 Four 61″
DLX-54
1
3/4
(DL-33)
….
#71
#58
#55

Indian 101 Scout
1929-30 37″ 101
DLX-63
1
13/16
(DL-40)
….
#55
#55
#52
DLX-50

Indian 101 Scout
1929-30 45″ 101
DLX-64
1
3/4
(DL-33)
….
#55
#55
#52
DLX-51

Indian Four
1929 Four
DLX-65
1
3/4
(DL-33)
….

Indian Four
1930-32 Four
DLX-77
1
3/4

Indian Scout Pony
1932 30.50″
DLX-78
1
3/4
….

DLX-78A?

Indian Scout, 101
1931-34 45″
DLX-79
1
7/8

Indian Chief
1930-32 74″
DLX-81
1¼
15/16

Harley Davidson?
DLX-88

….

??

Indian Four
1932-34 Four
DLX-97
1
15/16
….

??

Indian Scout Pony
1933-35 30.50″
DLX-98
1
3/4
….

??

Indian Std Scout
1933-34 45″
DLX-99
1?
15/16
….

??

Indian Chief
1933-34 74″
DLX-100
1¼
15/16
….

??

Indian MotoPlane
1933 45″
DLX-102
1¼
3/4?
….

??

Indian Std/SScout
1934-37 45″,DT
DLX-107
1¼
7/8
….

??

Indian Chief
1935-39 74″
DLX-108
1¼
15/16
….

??

Indian Scout/Chief
1935-39 ‘Y’ S/Scout
1939 74″
DLX-110
1¼
3/4?
….

??

Indian Four
1935 Four
DLX-111
1¼
7/8?
….

??

Indian Scout Pony
1936-39 30.50″Jr.
DLX-112
1
3/4
….

??

Indian Four
1938-39 Four
DLX-113
1¼
7/8
….

??

Indian ThirtyFifty
1940 30.50″
DLX-122
1
3/4
….

??

Indian Four
1940 Four
DLX-124
1¼
15/16?
….

??

Indian S/Scout
1940 +Bonneville
DLX-128
1¼
7/8
….

??

Indian Chief
1940 74″
DLX-130
1¼
15/16
….

??

Linkert  3 Bolt Pattern Only
Check Victory Library for more Linkert documentation.
Quick ID, All  1940 carbs bear the inscription “Langsenkamp-Linkert Carburetor Co….” 1941 and later bear the inscription  “L & L Manufacturing Co…”

You will note  some correlation between model numbers and years in the numbering sequence. (see our serial database decoding table)

Linkert Make, Model, Years
ID #
Size “
Venturi, “

Indian Chief Seventy Four
1941-1944 (M341-M344)
1946-1948 (M346-M348)
M341,M342, M343
M344, M346, M347
M348
1¼”
1-1/16″ or 1-1/8″

Indian Fours
1941-1942 (M441-M442)

M441, M442

1¼”

1-1/16″

Indian Junior Scouts
‘Thirty Fifty’ 1941-1942

M541, M542

1″

13/16″

Indian Sports Scouts
45″  Sports Scout 1941-1942
45″ Daytona Big Base 1948

M641,M642
M648

1¼”
1¼”

1-1/16″
1-1/8″

Indian Military Scout 741 GDA
30.50″ 1941-1943

M741

1″

3/4″

Indian Military 841 HDA
45″ Opposed Twin 1941
(twin carburetors, L & R)

M841L, M841R

1″

13/16″

Indian Chief 80″
1950-1953
(if not fitted with Amal,Police)

M350, M351,
M352

1¼”

1-1/8″

Harley
1937-1941 UL, ULH
1942-1948 UL, ULH
1937-1941 UL, ULH (opt)

M51
M51F
M51L
1¼”
1¼”
1¼”
1/1/16″
1⅛”
1⅛”

Harley
M21
1¼”

Harley
1941-47 Knuckle, 48 Pan
M35T

Harley
1937-1952
45″ WL WLA WLC
M88
1¼”
15/16

Harley
1936-39 EL Knuckle
M5, M5F
1¼”
1/1/16″

Harley
1949-1958 W and Servi-car
M18

Harley
1933 VLD, 34-36 V,VL,VLD
1937-39 WL, WLD
M2

1/1/16″

L&L Beck Aftermarket Replacement Carbs
These carbs were aftermarket Linkerts remanufactured by Beck. As you can see left, there was a small INDIAN stamped under or above the model number.

1939-1942 Chiefs
M6
1¼”

1931-1938 Chiefs
M6A
1¼”

1931-1938 Chiefs (Bonne)
M6B
1¼”

1939-1942 Chiefs  (Bonne)
M6BA
1¼”

1943-1947 Chiefs
M6AP (strainer)
1¼”

Harley 1930-1936
M6VL
1¼”

1934-1938 Sport Scouts
M6S
1¼”

1934-1938 Sport Scouts
M6SA
1¼”

1932-1943 30.40 Jr.Scouts, All
M7 , M7SA?
1

Indian Fours, All?
M8
1

Tillotson
The Tillotson Mfg Co. Toledo Ohio.
<Left  MS-34A

Tillotson
ID #

Indian Scout
1929-30 37″ 101
1933 Scout Pony
MS-33A
?
?
?

Indian Scout
1929-30 45″ 101
MS-34A
?
?
?

Amal
British designed and built Type 6 (early)  Amal Carburetors where used on some Chiefs ’52-53 (Police excluded),
Vertical Scouts and Warriors from 1949 to 51 (I think!). Note the 3 bolt linkert manifold to 2 bolt amal adaptor.

From the late 40’s through the early 70’s and beyond most all British, American, and European carburetors have been of similar types. Whether its an early Amal Type 6, or a Linkert, or a late Amal concentric, they all function basically the same. The major difference between American carburetors and those on British and European bikes, is that for the most part American carburetors have used a butterfly valve rather than a slide/needle to meter the air/fuel above idle.

Amal – Type 6, Model 29
ID #

Indian Arrow
1949-1950 Models 149,150
Amal
27?XX

Indian Scout
1949 Models 249, 250
Amal 275XX

Indian Warrior /Warrior TT
1950- 1951 Model ?
Amal 276ES

Indian Chief
1952-1953  Models 352 & 353
Amal 289R

Zenith

At this time I have very little knowledge on the Zeniths. I believe they were used on some 36/37 fours, i.e.. the upside down fours, particularly the sports four (dual carb). please contribute if you can.

Hedstrom <under development>
This is a variation (perhaps racing?) of the Hedstrom Hendee carbs as used in the early Indians

Marvel
Help!

Revision History

25/02/06
added photos on AMX12, Tillotson MS34A, Marvel and Beck carbs

25/09/04
minor corrections to Std Scout and ‘Y’ Scout (Schebler Deluxe)

24/07/03
Added more M series Harley carbs (3 bolt only), plus the Beck L&L aftermarket replacement

26/01/03
More work on the Amal Carburetor

06/17/02
Finally got around to doing something on Linkerts, thanks to Victory Library for their help

10/24/01
Added Zenith info (for what its worth!

07/02/01
Draft release, Schebler carbs completed, do you have more data to offer?

07/10/01
changes to the 101 scout’s, also added Tillotsons, thanks to Erv Moller.