Go into the
Weber tuning forum & read some of the posted threads. If you have a solid understanding of carburetor theory & some patience, you can tune them. Webers have their own idiosyncrasies, but with the a good linkage setup & simple vacuum synchronizer tool(inexpensive) you can get them ready to start jetting. Once you get them set, they should run well for you, unless you have a huge climate or altitude change.