Into The Wilderness Trading
2/11/24
Linkert M Model Carburetors
New information to add to this always appreciated.
Note that some models such as the M5,M4, etc, had both early 2 bolt & later 4 bolt air cleaner flanges and some models also had 4 lines of information on the "L&L Manufacturing" side while others of the same model had 3 lines. The "Langsenkamp"line was dropped in early 1940, so if the carb has 4 lines, it is pre-1940, 3 lines 1940 -up. Also note that some models such as the M74 & M74B had both early and late body castings and these castings overlap, and the M74 had 2 types of number stamps, early was centered, late was in the same location as the 74B.There are even a few, such as the M75, that used 3 castings.
I have a complete list of what body castings were used on what carb models and will post one of these days when I am really bored.
This information may be posted or re-printed provided that www.linkertcarbs.com is indicated as the source.
Red denotes venturi size & fixed jet size if applicable
HD-1 / M18 7/8" - 1950 Harley 45"
HD-2 / M54- 1950 Harley 45"
HD-3 / M61B - 1 1/8" 1950 Harley 61"
HD-4B / M74B 1 5/16" 1952-1965
FM-1 - 1952 Fairbanks Morse 36"
FM1A/ FM1B - 1955 - Fairbanks Morse
M1 - 1935 Fairbanks Morse 36"
M1A - 1935 Fairbanks Morse 36"
M1B - 1937 Fairbanks Morse 36"
M1C - 1945 Indian 13.5 cubic inch
M1F - 1949 Fairbanks Morse 36"
M2 1" 1931 Harley 74" except commercial, 1930 Harley DLD, RLD
MR2 1933-47 Harley racing & hill climb carb.
MR3 1946-1949 Harley racing carb. Bombsight
M4 7/8" 1932 . 1933 Harley D,R,Servicar
MR4 1950 Harley racing carb. Bombsight
MR4A 1950 - up Harley racing carb. Bombsight
M5 1 1/16" First Few 1936 Model Harley E,EL ( 2 bolt air cleaner, 4 line, 2-338 casting, the "3" stamped by hand on a raised boss) I have been informed that this is probably a
very rare early version for Crocker motorcycles, some had the "C", some did not.
M5 1 1/16" 1936 Harley E,EL ( 2 bolt air cleaner, 4 line, 2-348 casting, the "4" stamped by hand on a raised boss)
M5 1 1/16" 1937 Harley E,EL ( 4 bolt air cleaner, 4 line, 2-348 casting, the "4" stamped by hand on a raised boss)
M5 1 1/16" 1938 & 1939 Harley E,EL ( 4 bolt air cleaner flange,4 line, 2-348 casting,the "4"cast in with the other numbers, 2 soldered in plugs &
2 threaded drill plugs in the bowl stem )
M5 1 1/16" Late 1939 , only Harley E,EL ( 4 bolt air cleaner, 4 line, 2-348 casting, the "4"cast in with the other numbers, 2 threaded drill plugs only in the bowl stem )
M5C 1 1/16" Crocker Motorcycles
M5F 1 1/16" - # 149-20452 jet - 1936-1937 Harley E,EL ( Police/ CHP )
M5XX 1 1/16" 1936-1939 Harley E, EL ( Various Police Depts. Substitute letters for X's )
M5NYPD - "Probably" phony- Do not believe this was original as my understanding is that the NYPD was running all Indians during this time period, but who knows for sure
now, they may have played with Harleys then.
MR5 Harley racing carb.
M6 - 1 1/16" 1933 - 1938 Indian Chief
M6A - 1 1/16" 1941 Indian Chief ( same as M342 )
M6AP - 1 1/16" 1944 - 1947 Indian Chief ( same as M344 )
M6B - 1 1/16" 1940 -1945 Indian Bonneville ( same as MBONN-1 )
M6BA - 1 1/16" 1940 - 1945 Indian Bonneville ( same as MBONN-1 )
M6BAP - 1 1/16" 1946 Indian Bonneville ( same as MBONN-6 )
M6C - 1 1/16" Early Crocker variation ( experimental ? )
M6S - 1 1/16" 1947 Indian Scout ( same as M642 )
M6SA - 1 1/16" 1939-1943 Indian Sport Scout ( same as M642 )
M6SAP - 1 1/16" 1943-1946 Indian Sport Scout ( same as M644 )
M7 - 1933 - 1943 Indian Monoplane , 45" Scout
M7S - 1939 Indian Junior Scout ( same as M541 )
M7SA - 1933-43 Junior Scout ( same as M541 )
M8 - 1933-1939 Indian 4 cylinder
M8S - 1941 Indian 438 4 cylinder ( same as M441 )
M8SA - 1941 Indian 440, 441, 439-B, 439-M Indian 4 cylinder ( same as M441 )
M9 1935 Indian Pony
M7H - Henderson ( sold with adapter plate )
M7H4 - Henderson 4 Cyl. ( sold with adapter plate)
M10, M10/H4 - 1929,1930,1931 Henderson 4 cyl. ( sold with adapter plate)
M11 7/8" 1934 , 1935 Harley D,R,Servicar
M12 1930's Harley boardtrack racer ?
M16 7/8" 1936-1939 Harley RL, 1934-1935 74" Commercial, 1936-1939 Harley R,W,Servicar ( 4 line casting)
M16 7/8" 1940-1948 R,W,Servicar ( 3 line casting )
M17R # 63 jet - 1942 Harley XA, right side carb
M17L # 63 jet - 1942 harley XA, left side carb
M18 7/8" 1949-1958 Harley W,Servicar
M18RC 1942 Crosley Convertible, right side carb
M18LC 1942 Crosley Convertible, left side carb
M20 1940's Indian boardtrack racer
M21 1 1/16" 1930-1933 Harley 74" except commercial, 1930-1933 Harley DLD, RLD
M25 1 5/16" 1940 Harley E,EL, F,FL
M25R 1 5/16" 1940 ? Harley Race Carb - same casting as M25S but in ALUMINUM with very unique main nozzle
M25S 1 5/16" 1940 Harley WLDR, early 1941 WLDR
M31 1" 1930-1933 Harley 74" except commercial, 1930-E35 Harley DLD, RLD (Early "round" Casting) 1934 VLDD
M31 1" L1935-36 Harley DLD,RLD,RL ( Late casting with un-machined OHV shoulder cast in )
M31F 1" - # 6 jet - 1934 -1935 74" Harley Police
M341 1 1/16" 1941 Indian Chief 74
M341-1 1 1/16" 1941 Indian Chief 74
M341F - 1 1/6" -# 6 jet - 1941 Indian Chief Police
M342 1 1/16" 1942 Indian Chief 74
M343 1 1/16" 1943 Indian Chief 74
M343NYPD - 1943 Indain New York Police Dept.
M344 1 1/16" 1944-1949 Indian Chief 74
M344-A 1 1/16" 1944 Indian Chief 74
M344NYPD - 1944 Indian Chief 74, New York Police Dept.
M345 No production
M346 No production
M347 No production
M348 No production
M35 1 1/8" 1941-1947 Harley E,EL, 1941-1947 F,FL
M35F 1 1/8" - # 6 jet - 1940 61" Harley Police
M35T 1 1/8" L1945-E1947 Harley E,EL,F,FL ( I believe this carb actually came out on early 1946 models.)
M35TP 1 1/8" 1947- Harley E,EL,F,FL
M35P 1 1/8" 1940-1946 Harley 61" & 74" Police
M35S 1 1/8" Late 1940-1950 Harley WLDR, 1940-1950 WRTT
M350 1 1/8" 1950 - 1951 Indian Chief
M351 No production
M352 1 1/8" 1952-1953 Indian Chief ( MOST 352 models are factory restamps of different carbs as Indian was using various parts left "on the shelf". They owed everyone
money at this point. I believe only one small shipment of "factory" 352 bodies were ever shipped to them,.
M352C 1 1/8" 1952 Indian Chief, Chicago Police Dept.
M352NYPD 1 1/8" 1952 Indian Chief, New York Police Dept.
M352xxx 1 1/8" Various police depts. Replace the X's with CA, CHP,F etc.
M353 1 1/8" Have seen 4 of these over the last 40 years on 1953 Chiefs.. All appear the same, Indian probably stamped them " in house" for the very last run of Chiefs.
All I know of were on police bikes, but were NOT stamped with police markings, I personally believe only 5-6 were made.
MBONN 1 1/8" 1941 Bonneville Scout , Bonneville Chief
MBONN-1 - 1 1/8" -1941 Bonneville Scout , Bonneville Chief
MBONN-6 - 1 1/8" - 1946 Bonneville Scout , Bonneville Chief
M36 1 1/8" - # 18 jet - 1948 Harley E,EL,F,FL 686 M36 shipped May / June 1949 )
M36.* - 1948 E,EL,F,FL ( 138 total shipped in April, 1949 )
M36: - 1948 Harley E,EL,F,FL ( total of 207 shipped April. 1949 )
M36A 1 1/8" - # 18 jet - 1950 Harley E,EL,F,FL (field conversion for M36)
M36S 1 1/8" 1948- L1949 Panhead Racing (distinct nozzle - see photo below)
M41 1 1/16" 1936 Harley VLD - Early 338 4 line casting
M41 1 1/16" 1937-1939 Harley WL, WLD - early - 348 body, 4 line casting / 1940-1941 - late - 348 body, 3 line casting
M41F - 1 1/16"- # 6 jet -1936 74" Police
M41L 1 1/8" 1936 Harley 80'
M41LF - 1 1/8" - # 6 jet - 1936 80" Police
M42 1" 1937-1948 Harley 74"SV, 1937-1939 348 body, 4 line casting.1940-1948 348 body, 3 line casting
M441 13/16" 1941 Indian 440 4 cyl
M45 1 5/16" - L-1949-E-1950 Harley F,FL
M45A 1 5/16"- # 17 jet - L-1949-E-1950 Harley F,FL ( field conversion for M45) A few late 1950 74" bikes were shipped with M45A carbs
M45S 1 5/16" L1949- E1950 Panhead Racing (distinct nozzle - see photo below)
M51 1 1/16" 1937-1948 Harley U,UL, 1942-1948 Harley WL,WLD, 1942 Harley US Navy 1937-1939 348 body, 4 line casting. 1940-1948 348 body, 3 line casting
1942-1948 Harley UL, ULH Police.
M51F - 1 1/16" # 6 jet- 1937 74"
M51L 1 1/8" 1937-1948 Harley UH, ULH - 1937-1939 348 body, 4 line casting. 1940-1948 348 body, 3 line casting
M51LF - 1 1/8" - # 6 jet - 1937 80" Police
M52 1 1/16" 1949 - E1951 74"
M53 # 7 jet -1952-1953 Harley K models (there is also a version with a distinct racing nozzle, but with no different model # - see nozzle
; photo below - this is one of several I have pulled from 53s, all the same ) bombsight
M53A 1 5/16" - # 7 jet - 1954 K Model with bombsight
M53A1 1 5/16" - # 9 jet - 1955- 1956 Harley K models with standard venturi
M54 " # 4 jet L-1951-1952 Harley W,Servicar
M54A- 1951 Harley Military 45"
M54B " 1951-Harley Military 45"
M541 " 1941 Indian 540 30/50 Junior Scout
M55 1 1/16" 1936-1939 Harley E,EL , (1950's field replacement for M5)
M58 1 1/16" 1941-1942 Harley U, UL South Africa, 1943-1944 Harley Navy U, UL
M61 1 1/8" - # 18 jet - (early 398 casting, early type number stamp) L-1950 Harley E,EL
M61 1 1/8" - # 18 jet -(late 408 casting, late type number stamp) 1951-1952 Harley E,EL
M61B 1 1/8" (early 408 casting, late type number stamp) 1951-1952 Harley 61 field replacement (came out in 1951)
M61B 1 1/8" ( late 418 casting , late type number stamp ) 1951-1952 Harley M61 replacement ( came out in 1952 )
M64 1/16" - # 4 jet - 1940 Harley WLA
M641 15/16" 1941 Indian 640 Sport Scout 45
M64-1 - 1941 Indian 641 Sport Scout 45
M642 15/16" 1941 Indian 641 Sport Scout 45
M643 - 1 1/16" - 1944 45" Indian 644
M644 1 1/16" - 1944 45" Indian 644
M648 1 1/16" 1948 Indian Daytona big base 45
M65 1 1/16" - # 5 jet - 1940 Harley UA
M74 1 5/16" - # 17 jet - (early 398 casting, early type number stamp) L-1950 F, FL
M74 1 5/16" # 17 jet - (later 408 casting, late type number stamp in same location as M74B )E-1951 Harley F,FL ( see above)
M74B 1 5/16" - # 19 jet - (early 408 casting) L-1951
M74B 1 5/16" - # 19 jet - (late 418 casting ) 1952-1965 Harley F,FL
M741 - 3/4" - 1941 Indian Military 30/50 Scout
M741-1 3/4" 1942 Indian Military 30/50 Scout
M75 1 5/16" Early casting ( 378 ) 1941 F, FL
M75 1 5/16" Intermediate casting ( 388 ) 1942-1946 F,FL. High performance option
M75 1 5/16" Late casting ( 398 ) 1947 Harley F,FL High performance option
M75F 1 5/16" - # 15 jet - 1941 74" Police
M77 15/16" - # 1 jet -1949-1952 WLH (Same as M88 military) - Only 100-150 of these bikes were produced for the Dutch. ( Thanks Pascal ! )
M84 1/16" - # 5 jet - E-1941 Harley WLA
M841L # 63 jet - 1942 Indian 841 HDA 45" Opposed Twin, left
M841R # 63 - jet- 1942 Indian 841 HDA 45" Opposed Twin, right
M88 15/16" -# 1 jet 1937-52 Harley W, WLA( to Early 1951 ),WLC
M88S 15/16" - NO FIXED JET - 1946-47 -Civilian needles, short lever
M90 15/16" - # 1 jet - 1942-Harley ELC,1942 Harley ELA
M97 1 1/16"- # 5 jet - 1941 Harley TA ( OHV bowl ) ( Army 3 wheeler )
M1669 - WYSE Cycle - 1946
L&L DC Model carburetor applications -
DC1 - # 9 jet - 1957 Sportster XL
DC1L # 45 - jet- 1957 Sportster XL
DC1M #1 jet - 1957 Sportster Military XL
DC2 # 20 jet- 1959-1965 Servicar
DC4 # 10 jet - Have only seen 2 since 1965 and I have no idea of fitment !
Probably an experimental L1960 or E1961 Sportster XL carb. These had #10 fixed jets.
DC6 - # 4 jet - 1961 Sportster XLH, XLCH
DC7 # 45 jet - 1966 FL,FLH
DC10 # 4 jet - 1957,1958,1959 Sportster XLH, XLCH ( also used on 1969 militray XLB )
DC11 1959-1960 XLR
DC12 # 4 jet - L1963-1965 Sportster XLH,XLCH ( also used on 1969 military XLB )
All except DC2 are the same body. NOS bodies actually were shipped blank and the dealer stamped the number needed on them. I have owned a number of these NOS bodies over the years. If you have a larger bore body using a 9X throttle disc, this is from the modification bulletin Harley put out on the DC carbs many years ago. I do have a copy of this and it is posted here.
Differences on all except the DC2 were in jet sizes, needle & seats, bowl lettering, etc, all minor. If you go to our Jet page you can see which jets fit which models.
NO - they did not make a DC3, DC5, DC8, DC9, or DC11 ( "real" DC11 "race" carbs were modified versions of other DC models as per the race modification bulletin listed above, whether by Harley themselves for the XLR or by a particular dealer. Linkert did not make DC11 carbs as such, and you will also find these mods on every model out there except DC2, a few well done and re-stamped as DC11 ( probably by Harley for racers) , some very poor quality backyard jobs with the idle ports ruined, so look them over carefully. )
L&L S Model Carbs
DC1M #1 jet - 1957 Sportster Military XL
DC2 # 20 jet- 1959-1965 Servicar
DC4 # 10 jet - Have only seen 2 since 1965 and I have no idea of fitment !
Probably an experimental L1960 or E1961 Sportster XL carb. These had #10 fixed jets.
DC6 - # 4 jet - 1961 Sportster XLH, XLCH
DC7 # 45 jet - 1966 FL,FLH
DC10 # 4 jet - 1957,1958,1959 Sportster XLH, XLCH ( also used on 1969 militray XLB )
DC11 1959-1960 XLR
DC12 # 4 jet - L1963-1965 Sportster XLH,XLCH ( also used on 1969 military XLB )
All except DC2 are the same body. NOS bodies actually were shipped blank and the dealer stamped the number needed on them. I have owned a number of these NOS bodies over the years. If you have a larger bore body using a 9X throttle disc, this is from the modification bulletin Harley put out on the DC carbs many years ago. I do have a copy of this and it is posted here.
Differences on all except the DC2 were in jet sizes, needle & seats, bowl lettering, etc, all minor. If you go to our Jet page you can see which jets fit which models.
NO - they did not make a DC3, DC5, DC8, DC9, or DC11 ( "real" DC11 "race" carbs were modified versions of other DC models as per the race modification bulletin listed above, whether by Harley themselves for the XLR or by a particular dealer. Linkert did not make DC11 carbs as such, and you will also find these mods on every model out there except DC2, a few well done and re-stamped as DC11 ( probably by Harley for racers) , some very poor quality backyard jobs with the idle ports ruined, so look them over carefully. )
L&L S Model Carbs
HD S1 - 1948 Harley125
HD S2 - 1953 Harley 125
HD S3 - 1954 Harley 125
HD S4 - 1955 Harley 125
S-3, S5 - 1949 Indian
HD S5 - 1959 Harley 165
S-2, S-4 - 1949 Indian
HD S2 - 1953 Harley 125
HD S3 - 1954 Harley 125
HD S4 - 1955 Harley 125
S-3, S5 - 1949 Indian
HD S5 - 1959 Harley 165
S-2, S-4 - 1949 Indian