Folks,
One reason why Model Ms were replaced with the DC was that the horizontal throttledisc does not favor one cylinder over the other within a Shovelhead's super-short manifold. The higher port velocities of flatties, and the long intake tract of earlier OHVs were able to overcome the side-bias of a vertical disc.
The length of a Model M also means your right knee would be in the next lane, and its weight would require a monolithic support bracket.
Meanwhile, Pzokes wrote:
"If you properly rebuild a M series Linkert, with quality parts, they are an excellent carb."
This is true of course, but many critical parts are still not available out of a catalog, and much of what is on the general market is practically useless.
(Beware of USA-made throttleshafts that bind when the screws are tightened, venturies machined undersize, soft and raw needle knobs, etc.
And for imported parts, beware of rubber-tipped floatvalves, floats that don't float (even black foam ones), metric width needles, fixed jets drilled wrong, etc., etc., etc.
The one part you do not want to replace is the body, but often the bore is worn from a sloppy disc. The only cure is to remachine the body and fit an oversized disc and venturi. V-TWIN's oversized discs are abortions, and oversize venturies are not offered. Thus Linkerts' reputation remains marred by incomplete overhauls.
Pzokes also wrote:
"First rule, never use anything but one of the new style floats, NOT a brass float."
True, brass floats are tragic.
But beware that all black foam floats offered in catalogs and national advertizing use an obsolete, off-patent formula, and were reported to swell in Pacific Northwest USA fuels during the 2010 summer-blend season (attached).
Please note also that swollen S&S floats have been reported over the years as well, however productions after June of '08 should be safe, as that is when the latest formula became available, but not yet available in a molded Linkert replacement.
Pzokes also wrote:
"...if you have a "plumbers intake" use Enfield Racing's ferrules,.."
Also quite true..., however, you will need a perfect, pristine manifold that Enfield Racing's pre-cast seals will fit; Not only must they be a snug squeeze onto the spigots, but there must not be blemishes that will impress into the PEEK, lest it lose its miraculous re-useability. Beware that even new Colony replacement manifolds occasionally do not match spigot to spigot!
" but if using an "O" ring intake manifold, use quality "O" rings, and stock style clamps."
And the quality O-rings are the market currently are JAMES true viton offering, which actually do NOT swell three times their size in P4gas!
Beware of stock-style stainless clamps that are .030" too wide for Shovelhead (and probably Sportster) applications. They must be ground to .750"
....Cotten