Why would you bother with a piston port kit ! Any any kind of reed kit, Polini or treats reed kit, Athena reed kit blows all those pp kits paway plus gives more oil gas mix to the carter bearings! don’t run any of those piston port kits when you could run a 2 o 4 pedal reed kit! what’s the matter with you ! running lean with good gas mixture going into the Carter or the whole engine!
trust me most of my Polini or Gila kits built over 10 years ago are still strong running strong ! yeah true some of my Piston port kit with 14mm bing are running strong though I don’t own them anymore !