£50 Carb Autopsy. 1979 AMF Harley-Davidson XLH1000 Ironhead Sportster

It's enough to know those £50 carburetors flooding eBay are crap, but for the curious I present why. Two emulsion tubes; one made by a reputable company, and another from inside the offending article. The carb should in theory work with this modification, but the bike's running fine on the CV40 and I can live with the crappy old '76 fuel tank and Spring is in the air. Modification and rebuild season is now over; it's ride/repair/repeat 'til at least late November, by which time the running repairs will have reached critical mass again.

[@craigdoherty2974]

Save your pennies and buy the proper tube , same thing with the amazon CV40s . swap a few jets and your good to go. with the cv40s we often just swap the jets and run them with no issues .So what was the point ? Just buy the part and swap it out .

[@ImminghamIronhead]

I had a tube, but the carb was still way under par compared to the CV40. I went with a small bore Bendix Zenith come the end, which gave exactly the sort of low/mid range boost I was looking for. Possibly at the expense of full throttle performance, so swings and roundabouts 🙂

[@ShedMachine]

Have you ran the bike with this carb with the genuine s&s emulsion tube fitted?

[@ImminghamIronhead]

Not yet. While the flat spot was the most noticeable problem, I should think there will be others. It's on my 'try when you can be arsed' list, and I'll definitely post when it happens.

[@ImminghamIronhead]

Still ran badly compared to the CV40; I have a 36mm Zenith on there now.

[@finnegan2741]

𝓟Ř𝔬𝓂𝔬𝐒ϻ 😚