restrictor

What is the size hole on the carb synch hose restrictor? I lost my restrictors and am thinking of getting some brass or copper tubing to fit the hose, soldering one end shut, and then drilling a small hole in the soldered end to make my own. I could experiment, but decided I would just ask. I...

Ignorance is bliss.... I run Mikuni Flat-slides with the Stage 7 breather set-up. The motor has run well and I was happy. However... I have recently read about the restrictor (DJ7011) that goes into the original breather pipe. My questions: 1) What is the purpose of it (yes, I know it...