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M6AP m6 tillotsonms34a_small amal1 hedcarb2 hedcarb1 amal2 zenith2 zenith1 amalblowup hedcarb3 hedcarb4 marvelgskt_smalllinkcarbschbcrossCarburetor Model Identification & Specs for American Motorcycles

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.
amx12aamx13_small

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, TheaValve 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
This is a variation (perhaps racing?) of the Hedstrom Hendee carbs as used in the early Indians

Marvel
Help!