From:Steve Marks
Subject:RE: RE: RE: RE: Schebler DLX-66 Date:Sat Feb 17 13:31:58 2007
Response to:1478
Just putting the paperwork away and I see that the Zenith Carburettor Bulletin No. 8 I referred to has '1st Edition, Nov 1921', printed on the back page....

I have two versions of the DeLuxe parts lists (see seperate posting) - both show carburettor as being T4. I also have a 'Zenith Carburettor Model T Bulletin No. 8' which describes T3, T3-1/2 and T4 carbs. None of my Henderson paperwork mentions T4'X'. But... every carb I have and/or have seen is either a T3-1/2 or T4X. I don't recall seeing any written reference to a T4X but there seem to be plenty about from what I've seen. I don't recall ever seeing a T4 carburettor although I think there was one listed on eBay a few months back. Can anyone tell us the difference between the T4 and T4X?
The above mentioned Bulletin No 8 has a number of interesting statements:
'....made in three nominal sizes, 3/4", 7/8" and 1", and in the 1" size can be supplied with cast iron barrel and air intake with consequent savings in cost'
'Prices of Model T complete: T3 - $15.00, T3-1/2 - $17.50, T4 - $20'
'T4 With Cast Iron Barrel and Air Connection.....$18.00'
'T3-1/2 Special Nickel-Plated Outfit complete with Air Intake Adaptor for Henderson Motorcycle....$20.00'
A few observations (guesses?)
No date given on the bulletin but as it specifically mentions T3-1/2 for Henderson - 1920/21 to coincide with the Model K years?
My Model K parts list lists the carburettor (no make/model indicated) as K-1778 at $20.00. The Deluxe parts lists both list Zenith Carburettor T-4 as K-1775 at $20. These prices agree with the Zenith booklet so assume nickel plated T3-1/2 special on the model K? The non-cast iron T4 on the DeLuxe (that is, not the cheap version...quite right too!)?
And finally, please remember that the Zenith booklet referred to above is not Henderson specific - as far as I am aware, Henderson never used the T3...

Did they jump right from T3 1/2 to T4X for the DeLuxe. I thought a T4 was used for the first few years of the DeLuxe and then the T4X came into use part way along (maybe 1926 or 27?). Does anyone know for sure? ... Perry

Hi Dirk
Can't answer the question re what uses DLX66
lists a lot of them but not the 66 (unless I've missed it on my quick scan through!)
Main reason for the response is to let you know (if you didn't already) that your 20 (and 21) Model K should use a Zenith T3-1/2 which is a bit rare. The Deluxe used the T4X. These look similar and most parts are interchangeable BUT the stud spacing on the inlet manifold is bigger on the T4X so, although they are more common, they won't fit straight onto your 20 manifold. Manifold to cylinder stud spacing is different too so you can't fit a Deluxe carb/manifold combination straight onto model K cylinders either. If you go looking for a Zenith and find one, look very carefully at the main body for cracks. The original metal used for the venturi tube, absorbs moisture and swells in size. In the long term this can swell so much the the main body cracks. Very common - I've seen more cracked bodies than I have good ones!

I guess you could use the DLX-66 but you would obviously need an elbow. Attached picture shows a similar setup from an April 1985 issue of 'Classic Bike' magazine. The centre spread picture shows the owner, Benito Battalini, riding the machine around Imola so it obviosly works! I believe Benito is active in the European Chapter of AMCA but I don't have any contact details for him.
Hope this helps - Steve

I have a DLX-65 and a DLX-66 carburetor.
The DLX-65 is for 1929 Indian Fours. The DLX-66, due to the intake, looks like being for an early 45 Harley(1929-31). Any idea what it is for?

I have a 1920 Henderson but it is supposed to have a Zenith. Can I use the DLX-66 in case I have no Zenith?