Luke, you can take the carb off the Saito and turn it around so the needle is on the other side, I have. Just be careful doing it so that you don't strip any threads, and get a tight seal between the carb and the engine, you don't want any leaks.

My Saito 72 is going on my Capiche. I have got one of those Weston Quiet silencers for it, and a perry pump so that I can maximise the performance