Reply to "proform"

Carburetors may be 90 yrs old but they are still a quite complex mechanical device. And 'just changing bodies' is not simple. There are a myriad of combinations of drillings & passages that must match up in the metering blocks, jet plates & bodies. In some carbs, only one passage being off in a metering block gasket can cause all sorts of problems, even with all the same mechanical parts. This's why carb shops get significant dollars for rebuilds, tuning etc. Your only hope is to clooect all the old stuff you removed, disasemble the carb as it now is, and begin chechimng every simngle drilling and passage. Once thats done, you can begin tuning.... or send the thing back & ask the maker to fix it. And as has been mentioned, it may not even be the carb. You get much the same symptoms for some types of ignition problems.Theres an entertaining article written by Chuck Melton of Nor-Cal Panteras on his carb rebuild [www.geocities.com/provamo72/index.html] .I believe it involved nearly 3 months of build-up, test, tear-down etc and was finally resolved as a whole series of problems with both carb bodies, some of which occurred while he he was trying to fix something else in the carb.