1978 cb 750 float bowl drain screw function?

Posted by pat english on Jun 25, 2012; 3:32am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/1978-cb-750-float-bowl-drain-screw-function-tp4023463.html

Hey,been a long time since ive been on here,but im still obsessed with cb 750's..Anyways,Im trying to build the current cb 750 as cheap as possible,but i ran into a problem.The float bowl drain screws on 2 of the carbs would not come out.I tried everything but heating them with a torch.The heads of the screws got so bad after using the inpact screwdriver that i had no choice but to try and drill them out.That did not work either.
  So,my question is what is the function of the float bowl drain screw?can i just drill out the hole and re tap it and use a regular machine screw and crush washer?thanks,
                                                                                pat