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Quick question, I recently purchased a 4150 with mechanical secondaries(pn# 4777-4) , and I am about to install it but I noticed the secondary throttle plates don't open all the way when the primaries are at WOT. They open to about 80 to 85% almost 90 but not quite, is there an adjustment I can do on the lever or something?? I was sitting there looking at the lever and I can't figure out how to adjust the secondary throttle without touching the primaries. Kinda new to this, any info would help.