EMPI VW Carburetor Main Jet - Select Size - for Brosol & Solex

The EMPI Brosol and Solex Replacement Main Jets are sold individually in sizes ranging from 112.5 to 170. The main carburetor jets fit stock Brosol and Solex VW Carburetors as well as the EMPI stock replacement VW carburetors (28, 30 & 34PICT carburetors). The main jets also fit EMPI and Brosal Kadron 40/44EIS Carburetors. Main jets allow you to dial in your carburetor for your altitude, engine size or the quality of fuel that you have available. Your carburetor runs on the main jet from roughly 2500 up to about 4000 RPM. If your engine is otherwise well tuned (the timing is correctly set, the valves are adjusted, etc) and the carburetor is mis-firing above 2500 RPM there is a good chance that your main jet is too small, your engine is running lean and should be swapped out for a larger size. Conversely, if the engine at higher RPM doesn't run well or seems bogged down, the main jet is probably too large and the engine is running rich and the main jet should be changed out for a smaller one. Running too lean can cause your engine to over heat and can burn a hole in a piston or valve. Running too rich wastes fuel (lower MPG) and can actually cause premature engine wear as it can wash away the oil lubricating the piston and cylinder. Spending the time to properly dial in your carburetor is well worthwhile as it helps ensure a cool running, fuel efficient engine.