LJWalter Posted November 19, 2012 Report Share Posted November 19, 2012 need a hand. 85cb450 nighthawk. was not getting fuel to the carbs. I thought petcock as the was no flow when it was turned to the on position. I purchased the rebuild kit and carefully installed it. Still nothing. I also attached a funnel to the carb fuel line, 1/2 cup of gas & it ran just fine. My question is should fuel flow free from the petcock when turned on or do the carbs suction it out? Not much experience with the older ones.Thanks! Quote Link to comment Share on other sites More sharing options...
LJWalter Posted November 19, 2012 Author Report Share Posted November 19, 2012 Also, no tank debris, filter is clear as a bell Quote Link to comment Share on other sites More sharing options...
Moto-Brian Posted November 19, 2012 Report Share Posted November 19, 2012 Yes. If you open the fuel petcock in the "open" position, fuel should flow out. Quote Link to comment Share on other sites More sharing options...
conn-e-rot Posted November 19, 2012 Report Share Posted November 19, 2012 Silly question but do you have enough fuel in the tank? Quote Link to comment Share on other sites More sharing options...
LJWalter Posted November 19, 2012 Author Report Share Posted November 19, 2012 That's not always the case. Check the vacuum line to the petcock. A lot of fuel cocks require vacuum to actuate the diaphram inside.This^vacuum lines needed swapped. Thanks for the help! Quote Link to comment Share on other sites More sharing options...
Moto-Brian Posted November 20, 2012 Report Share Posted November 20, 2012 That's not always the case. Check the vacuum line to the petcock. A lot of fuel cocks require vacuum to actuate the diaphram inside.Good call. I wasn't sure on that older style bike if they used that setup. Nice! Quote Link to comment Share on other sites More sharing options...
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