Here is where the fuel shut off is -'d have to take Jason's tank off to ge a 
better pic. Let me know if you need me to do that.
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-----Original Message-----
From: Graham Rogers <[email protected]>
Sender: [email protected]
Date: Sun, 20 Apr 2014 08:06:50 
To: <[email protected]>
Reply-To: [email protected]
Subject: [Nighthawk Lovers] Carbs on 1980  CB750k

Hey Allen, I have been corrected. Here is a description of what they are

Sent from my iPad

> 
> First seen in 1965 on the CB450, they are metal piston, constant velocity 
> carbs. No diaphragm, the fit of the piston to the cap is the seal. They work 
> just like all the others, a pressure differential causes the slides to rise, 
> damping of motion by soft internal springs. They must never be mixed up. All 
> parts from each carb go back where they came from. (hand selected parts) The 
> caps install so they can be read from the riders position. Discontinued by 
> reason of high cost. 1965~1982. (Wings only, after that)  Long term has 
> proven them to be superior to diaphragms. Last forever (almost) with out the 
> high cost of the replacement diaphragms. Three or more stages of jetting. 
> Wings, five. 
> 
> 
> 

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