Carburetor and Fuel System
Title: Correct carb please advise
Post by Cotten on Jul 14, 2006, 3:58pm
M-36s are far more common than M-45s, so I tend to think that the switch was very late in the production.
Perhaps so late as when the cast manifold was re-introduced.
...Cotten
Post by fred on Jul 14, 2006, 4:21pm
If the bike were judged what would the look for to be sure I have a M 45 it did not come on the bike when I got it several years ago it had a74B which is wrong. you mentioned the cast manifold how can I ID what I have
Post by panzr4ever on Jul 14, 2006, 8:06pm
The M-45 is listed as correct for later 49 to early 50 F and FLs; the M-36 is listed as correct for early-early-1950 61 motors and early 1949 F and FLs
And, got to looking at my Linkert book and noted a couple of things...
The venturi on the M36 is 1 1/8"; for the M46 it is 1 5/16"
The M36 is described as being used for EL, FL, FLEs low perf. models, while the M45 is described as being used for FL, FLH high perf and KH models
Both use the same main nozzles, throttle disc angle is slightly different ( by 3 degrees)
Post by fred on Jul 14, 2006, 9:01pm
up date on the manifold it is Cast Iron
Post by Cotten on Jul 15, 2006, 3:29am
What "Linkert Book" are you quoting?
...Cotten
Post by panzr4ever on Jul 15, 2006, 8:50am
Cotton, it is called the linkert Book and is published by Victory Library. I found it when I was doing research for the 49EL I am putting back together. The carb that came with the basket was a bastard of several carbs. The book has helped me rebuild it the right way.
It covers the whole gambit of Linkert carbs...from how it works, identification, carb selection, speed tuning, manifold adapters, racing Linkert series carbs, jet size tables.
The website is http://www.victorylibrary.com
Post by Cotten on Jul 16, 2006, 2:07am
Panzr4ever!
I think Mr. Diamond was probably suggesting that the M-45 could be used for those models, if you have quoted him accurately. The inclusion of a K is your first clue, as the M-45 had been superseded two years before they came out... and used the M-53.
If he states it as historical fact, it is very disappointing. (My copy is quite old, and I don't even remember where I filed it.)
Palmer's lists the M-45 as production for later '49 and early '50 F and FL only. The M-36 was supplied on 'early' '49 F and FLs, and E models throughout '49 and early '50.
If Mr. Palmer cannot document the serials of when these changes occurred, I would guess that the information has been truly lost.
....Cotten
Post by panzr4ever on Jul 16, 2006, 9:29am
So Cotten are we not in agreement re carb for the pan motor?......or am I all f'd up in reading your post....Dave
Post by Cotten on Jul 16, 2006, 2:43pm
Fred's original question was basically whether his machine was 'early' or 'late' 1949, basis his serial number.
We have no accounts of exactly when the M-45 was introduced during the 1949 production year, or when the M-74 superseded (replaced) the M-45 in 1950.
You might get a better feel by comparing the serial with the total production for the year (if sources can even agree upon that!)
About the manifold:
'48 and most all of '49 manifolds were fabricated steel instead of cast steel, as shown at http://www.hydra-glide.com/coppermine/displayimage.php?pos=-611
Note silver-soldered seam.
Again, we do not know by serial when this change occurred.
It is revisionist to assert that changes in production were even clear-cut at the time, but we all want to please the AMCA judges (yeah,...right....insert winking face). Most of them will want to see a fabricated steel manifold.
Panzr4ever!
Mr. Diamond is not here to clarify, so I must conclude that his pamphlet was addressing hop-ups and possible carb-swaps when he cited all those models that were produced later with other Linkerts. FLHs and K's didn't exist in 1949 or 1950, when the M-45 was in production.
By the way, low compression models ("low performance"??) were Es and Fs. ELs and FLs were "high compression".
....Cotten
Post by fred on Jul 16, 2006, 5:34pm
In Greg Field's book Panheads he states that 12685 Panheads were sold in '49 out of this number 8014 were FL's (my # is 49FL7267). Where does serial numbers start for the year No.....0000?????. If it does mine was one of the last 49's That would make the M45 proper...not the M36. Thanks for your input Fred
Post by Cotten on Jul 16, 2006, 6:47pm
Fred!
The prototype for each production year was supposed to be #1000.
Thus, your 7267 was approximately the 6267th Big Twin (Es and Fs were numbered consecutively together) off the line, or just about in the middle of the production. As far as I'm concerned, that's a free ticket to go either way as far as 'early' or 'late'.
I suggest that all spend the money to aquire Mr. Palmer's landmark reference: "How to Restore Your Harley Davidson.." (Motorbooks International).. Although not perfect by any means, it is far better of an investment than coffeetable books or zeroxed flyers.
....Cotten
Post by fred on Jul 16, 2006, 8:45pm
Thanks Again for all the help. Fred
