Balancing weber 40 IDFs on 1.7 Sprint
Can anyone tell me whether the Weber 40 IDFs on a 1.7 Sprint engine normally have the air bypass screw holes blanked off because mine are. I've got idle mixture screws, vacuum ports, distributor vacuum advance port but that's it.
I know how to adjust the idle mixture screws to get the lean best idle but then I've got no way of balancing the barrels on each carb.
I haven't tried to adjust or measure anything yet until I know what's going but has anyone got the same and could you point me in the right direction?