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Prima Keihin PB Main Jet Kit (4mm, 10 pcs); QMB139, Gen 50cc

Prima Keihin PB Main Jet Kit (4mm, 10 pcs); QMB139, Gen 50cc

Prima

$16.99

Contains 70, 75, 80, 85, 90, 95, 100, 105, 110, 115 jets.

Jetting is something that takes trial and error. See our blog page of for more info.