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-   -   Ironhead 36 mm zenith bendix (http://xlforum.net/forums/showthread.php?t=1993814)

randy3934 4th October 2016 02:14

36 mm zenith bendix
 
anyone running a 36mm bendix zenith on a 1,000 cc ironhead? went to rebuild one of my swap meet finds and discovered it's 36mm. will it run good?

randy3934 4th October 2016 02:16

Also, anyone looking for any 79 xlh parts? picked up a pair for cheap with titles.

needspeed 4th October 2016 03:36

I can tell you about some of the differences between the 38 and 36 bendix that I have.
The 38 is what came stock on a '74 xlh. The 36 was givin to me and I don't know where it came from and I've never used it.

Aside from the venturi size the other main difference that might affect the way it runs is the number of secondary idle discharge ports. These are the holes that get uncovered by the throttle plate at part throttle settings.

The 38 has 3.(in addition to the idle adjustment screw hole).
The 36 has 2.(in addition to the idle adjustment screw hole).

The air cleaner screw bosses on the 36 are smaller and I've heard prone to breaking.

http://i1381.photobucket.com/albums/...psxmqw6bhj.jpg

The 36 does not have a bowl vent hole that the 38 has. I can't see why it would need it though.

http://i1381.photobucket.com/albums/...psx0rxvxfv.jpg

http://i1381.photobucket.com/albums/...psn0lzygev.jpg

The 36 should have more air velocity thru the venturi but flow less total CFM.

So to answer your question- will it run good?
Sorry, I don't know.:o

brianbbs67 4th October 2016 04:33

It was only standard equipment for a year. Must have been a reason. Could your bike run fine on it? Probably.

Racepres 4th October 2016 16:10

smaller venturi equals better throttle response, but, a Possible [possible] loss of top end [WFO only] performance.
For putting about, I always choose a Smaller [relatively] venturi. which, in todays world a 38 already is.
YMMV
But, I bet most would Never know the Difference...Honestly.

Sprtstr1200s 4th October 2016 16:24

Quote:

Originally Posted by needspeed (Post 5450766)
I can tell you about some of the differences between the 38 and 36 bendix that I have.
The 38 is what came stock on a '74 xlh. The 36 was givin to me and I don't know where it came from and I've never used it.

Aside from the venturi size the other main difference that might affect the way it runs is the number of secondary idle discharge ports. These are the holes that get uncovered by the throttle plate at part throttle settings.

The 38 has 3.(in addition to the idle adjustment screw hole).
The 36 has 2.(in addition to the idle adjustment screw hole).

The air cleaner screw bosses on the 36 are smaller and I've heard prone to breaking.

http://i1381.photobucket.com/albums/...psxmqw6bhj.jpg

The 36 does not have a bowl vent hole that the 38 has. I can't see why it would need it though.

http://i1381.photobucket.com/albums/...psx0rxvxfv.jpg

http://i1381.photobucket.com/albums/...psn0lzygev.jpg

The 36 should have more air velocity thru the venturi but flow less total CFM.

So to answer your question- will it run good?
Sorry, I don't know.:o

Idle discharge ports/ A friend had a new '72 XLH, his Bendix had an "A" stamped on it. I had a new '73 XLCH and had a "B" stamped on it part number. His carb only had 2 ports, mine had 4 ports if I remember correctly.

randy3934 21st September 2019 22:46

this post was from a few years back hahaha, I did use that carb, it has adjustable main, I put it on a 74" shovelhead, runs just fine, starts really easy with kicker, don't notice any power loss at WOT, runs right up to 5,550 rpm and still climbing in 4th. should run fine on a ironhead.

curiousgeorge 22nd September 2019 00:25

What main and idle tube did you use or what was in it?

Kingrabbit 22nd September 2019 02:41

36mm Bendix
 
https://i.ibb.co/tBdCfjV/19-AB1981-A...114-A65-BC.jpg

I have a Bendix 36mm with 4 holes on my 73 XLH.

randy3934 22nd September 2019 18:49

Quote:

Originally Posted by curiousgeorge (Post 5778114)
What main and idle tube did you use or what was in it?

it has adjustable main


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