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GSX400e petcock with strange screw.

  • Thread starter Thread starter Polish-Jack
  • Start date Start date
So how does it work exactly? If I turn it a couple of times will it let fuel flow without the need for vacuum? Can I remove it completely to drain a tank?
 
Yes ,it's the prime screw, same as on a gsx 250, the rubber o rings can perish, & then let fuel to constantly run, causing hydro lock. You just unscrew it a couple of turns to prime carbs if you need to. thanks
 
Polishjack, where did you get that? and/or is there a number on it?

(again,yes it is the prime ...handy to fill carbs or drain tank or run the bike if the vacuum mechanism fails-but that one looks new! )
 
Solves the problem of leaving it on Prime by mistake. It can be easy to confuse Reserve and Prime, and when the fuel gets low, either way has the same result - well, until you park the bike and don't get around to filling it for a week. Given that the design required a brass stepped plunger and two o rings plus machining a seat and threading the.......well, the accountant liked the three way version better.
 
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