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What are the sizes in the carb/spares? I'm curious what they are providing. I assume 138/200?In my '75, USA-spec, I found a 144 primary, and a 230 as the secondary. The primary is located on the valve cover side, on an Aisan. My suspicion is that the jets were swapped.
I just got a non-USA carb. It came with spare jets in the jet access plugs.
Easier to tell which is primary vs secondary and not put them in the wrong placewhy are the jets different materials
A 78 is a very different vac secondary carb with very different jet sizes.
I just pulled my 12/78 carb apart a little bit last week and I'm pretty sure these are the stock jet sizes for that build date:
Primary main: 1.36mm
Secondary main: 1.71mm
Primary slow: 0.75mm
Secondary slow: 0.80mm
I haven't pulled the power jet yet, but I think the primary main along with the power jet will be your two primary sources to look at for whether you're running rich or lean. Obviously the secondaries have a part in it as well, but I would check those first. Sounds like bumping up to the 1.44mm on your primary main was a good idea.
I don't know much about octane and how that affects engine performance, but I have come to the understanding that you want to use higher octane for higher compression engines, which a 2F is not. I have read here on MUD some other things about octane, you might want to research and make sure you're running the correct octane fuel. Maybe using an 86 or 88 octane will help a bit? My '77 doesn't seem to care much about 10% ethanol gas, which is standard here. That may or may not have an effect on what you're experiencing.
Those jet sizes are for a non-US 2F carb.i'm into my carb and had a look at the jet sizes... or trying to figure that out.
first i noticed my Brass Jet 150 is in the Secondary and the Silver/Chrome 220 is in the Primary.
the Primary should have the smaller of the two jets?
They are both brass, but on some applications the secondary jet is nickel plated. The plating is usually gone after 20 years of gasoline immersion. Maybe this is a newer non-smog replacement carb.why are the jets different materials?
Depends on market. 150/220 is pretty common.What are the sizes in the carb/spares? I'm curious what they are providing. I assume 138/200?
My question is more pointed to the new OEM carb's that are still available and what they are entering in. Supposed I'd need to see which pn's folks are buying to start pinpointing specifics.Depends on market. 150/220 is pretty common.
I got it from City Racer, just the other day. I needed the spacer, and I wanted a few extra threads on the carb stud so it stood like my smogerator did, so I made one serviceable one, and two sloppy ones that I rejected, with a long M6x1 and a Hanson die - it isn't easy getting a die perpendicular to the axis on an un-threaded rod.My question is more pointed to the new OEM carb's that are still available and what they are entering in. Supposed I'd need to see which pn's folks are buying to start pinpointing specifics.