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Old 05-16-2015, 04:00 PM
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natemoen natemoen is offline
Master of XSology
 
Join Date: May 2010
Location: Fargo
Posts: 8,624
Each petcock has 2 nipple on it. The one facing forward is the vacuum line, which needs to be connected to to its respective sides intake boot nipple. The petcocks nipple facing into the middle of the bike is the fuel outlet nipple. This is the nipple that is connected to the lower nipple on the carbs.

Clean the petcocks out good and check the diaphragm for any holes. No holes, then you should be good and they should work fine after a good cleaning.
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1978 XS1100E
K&N Filter
#45 pilot Jet, #137.5 Main Jet
OEM Exhaust
ATK Fork Brace
LED Dash lights
Ammeter, Oil Pressure, Oil Temp, and Volt Meters

Green Monster Coils
SS Brake Lines
Vision 550 Auto Tensioner

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