Bendix carburetor
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Road Captain
Joined: Sep 2009
Posts: 574
Likes: 219
From: Georgia
Bendix carburetor
Ive been tinkering with the 1972 xlch with bendix carb. We got the bike as a project and have worked on it trying to get it going. Im new to ironheads. The problem Im having is when the bike gets hot it wants to pop at idle and go dead. Ive put new points & condenser gapped by the book, adjusted timing with dial timing light, by the book. Replaced plugs and coil and rebuilt carburetor. Adjusted valves by the book No evidence of intake gasket leaks. Im thinking I may have to tesr back into csrb. Thought Id check here for recommendations.
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Road Captain
Joined: Sep 2009
Posts: 574
Likes: 219
From: Georgia
It will do pop when I give it gas, but it will also pop and go dead just sitting there running. On a cold start it runs fine til hot. When I cold start it, I will screw in throttle thumb lock screw higher than idle to warm it up. If I unscrew the thumb lock (when hot)to let it come down to normal idle, it will run a few mins then pop and do dead without me touching throttle. Runs good at speed going down road, no hesitations or pops. Then I come to a stop, and if I don't keep it slightly reved, it will pop and go dead. If I idle it up to 1500-2000 rpms it won't pop or go dead. Its the Bendix with fixed jet. I pulled petcock and screen / tank are clean.
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Road Captain
Joined: Sep 2009
Posts: 574
Likes: 219
From: Georgia
On idle stop, it has to be idled too high to not pop and die.
It has a fixed jet. Is it removable? Cant remember. Been a while since I had it apart.
Gotta check again for air leaks. Ive sprayed wd40 on it and no change.
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,619
Likes: 3,387
From: Cental, MI
I don't use the squirter on any of My Ironheads.. Don't need it if tuned correctly...no reason to Throttle jockey..stabbing the throttle accomplishes Nothing!! and Do Not Idle so Low..
Edit to rescind the "any". There is an old Ironhead here, that is Tired, mostly Bone Stock. It needs to be quite Rich, plus a small Squirt, to act proper! So...If you try to replace that "packing" get the real one from Facet Fuel/Zenith
Edit to rescind the "any". There is an old Ironhead here, that is Tired, mostly Bone Stock. It needs to be quite Rich, plus a small Squirt, to act proper! So...If you try to replace that "packing" get the real one from Facet Fuel/Zenith
Last edited by Racepres; Apr 25, 2025 at 09:45 AM.
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Grand HDF Member
Joined: May 2007
Posts: 3,870
Likes: 499
From: Alberta
I've had a fairly clean XLCH project for a couple of years now. Had the stock Bendix ultrasonic cleaned and kitted with OEM parts; also changed o-rings and fitted a new support bracket made of angle aluminum. Runs like a top! Smooth starts and relatively smooth engine up to 75 mph. I credit the proper cleaning, rebuild and setup to a gray haired HD mechanic friend; I hand fitted the support bracket and o-rings myself.
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