With so many engine types, it has become necessary to have an accurate
way to check carburetor components. Here’s a
simple solution to determine the size of carburetor jets, fuel and air bleed
passages. Additional Tip for Race Applications:The minus set is better suited for engine builders to check components for technical inspection requirements, eliminating the possibility of inspections showing a part or passage check illegal. Inspectors often use the plus size sets, to provide the racer with the "benefit of the doubt".
Download our conversion chart with sizing for decimal, metric or numbered