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General Category => General Discussion => Topic started by: cappisj1 on November 21, 2020, 08:27:17 PM

Title: 73 Eldorado - port size to balance carbs
Post by: cappisj1 on November 21, 2020, 08:27:17 PM

I added a 73 Eldorado to my ride options. The intakes don’t have ports to balance the carbs. I have gauges that I used to balance my 75 T. What are my nipple options and best way to add them?


(https://i.ibb.co/BjJXbws/0-F5-BF4-A4-5-C0-C-4941-B21-B-D41-CF811-F679.jpg) (https://ibb.co/BjJXbws)

Title: Re: 73 Eldorado - port size to balance carbs
Post by: Antietam Classic Cycle on November 21, 2020, 08:42:56 PM

https://www.thisoldtractor.com/moto_guzzi_loopframe_intake_manifold_modification_to_support_vacuum_balancing.html

Title: Re: 73 Eldorado - port size to balance carbs
Post by: Kiwi_Roy on November 23, 2020, 12:20:10 PM

The thread is 6mm
If you get a couple of 6mm grease nipples and file the tip of the threaded end the spring and ball will pop out leaving you with a nice hose fitting.
You would also need screws to blank it off later, an "O" ring works as a seal.
Use rubber hose for the first few inches, plastic will get soft and fall off when the manifold gets warm
Having said all that I just use a drill bit to measure the slide opening on my 72 Eldo, I don't believe the balance is that critical.