perf pipe jetting--richer or leaner?

uperjim

New member
Joined
Mar 4, 2004
Messages
42
Does anyone know if you jet leaner or richer when you add a performance pipe? My son just installed aaen quad pipes on a vmax4 and the sheet from aaen says start with the factory jets and then lean from there. I always thought you richen from the factory setting because of the increased flow. Just like you richen when you install a cold air intake. Just don't want to make a mistake on this one and run too lean. Thanks!
 


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