Well, Got the Carb from Mr. Cheap... His depression chamber doesn't hold vacume either ( hole in diaphram) <P>Q: Before I replace the DC, Has anyone tried to remove the DC and just have a spring to open the secondary ?<P>Playing with my new "spare" carb it seems that as the primary approaches WOT, the secondary will start to open ( if there is vacume) Assuming there is always vacume. would this always open the secondary?<P>I guess Mikuni has designed this to close the secondary if vacume is lost ( low engine speed?, stall etc) to Get the vacume back up.. No vacume, no venturi effect and the carb runs lean....<P>If someone know carbs... please advise... Perhaps this will only be a temporary fix until the new DC arrives from Japan.<P>- Suggestions