Hey guys, new to this site. Thank you for wealth of knowledge. Just completed building the f 1/2 engine on this 74 fj and to my surprise this carb has much larger jets than book calls for. Apparently the main primary and secondary were installed backwards before I got it. Can anyone help me with finding correct jets for this carb? Note, all 80 or so jets that I have are too large. Thanks in advance.
74 fj40 carb jetting (1 Viewer)
- Thread starter Apostle
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GA Architect
SILVER Star
Maybe this EPC page will help: -> click here <-
Once you figure out the correct size, here is a location you might could by some new jets: Jets R Us mikuni, keihin, hitachi, holley, vintage, jets and carb parts - https://www.jetsrus.com/
Once you figure out the correct size, here is a location you might could by some new jets: Jets R Us mikuni, keihin, hitachi, holley, vintage, jets and carb parts - https://www.jetsrus.com/
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120 & 180 is a good start.
- Thread starter
- #5
I'm at about 700ft here at home, I'm heading to Colorado to drive several mountain trails as soon as I complete the carb & SOA swap I'm currently working on. It's real important to me to finish this project , I'm getting married and going on this trip for a honeymoon
.- Thread starter
- #6
Oh, & yes it's a 74 car to my knowledge , there is a tag with 60205 on the carb.I'm at about 700ft here at home, I'm heading to Colorado to drive several mountain trails as soon as I complete the carb & SOA swap I'm currently working on. It's real important to me to finish this project , I'm getting married and going on this trip for a honeymoon
Thats a spread of elevation if you live at 700 but are planning to take it up into the mountains. I currently live at 1000 ft and have my carb set up like Jim suggested :
120 primary
180 secondary ( or 200 if I had one)
60 & 80 slow jets
80 power valve jet
When I lived in Colorado at 8000 ft and regularly drove it higher:
114 primary
180 secondary
50 & 50 or (60) slow jets
60 power valve jet
120 primary
180 secondary ( or 200 if I had one)
60 & 80 slow jets
80 power valve jet
When I lived in Colorado at 8000 ft and regularly drove it higher:
114 primary
180 secondary
50 & 50 or (60) slow jets
60 power valve jet
- Thread starter
- #9
Wow, thank you for your time & info. I will use your information in setting a baseline for my carb.
This cruiser was running so rich when I got it that After 5 mins of driving my clothes smelled of fuel exhaust so bad I would have to change.
Post up some pics of your set-up.
