Not to be an advocate of shoving nitrous into a poor defenseless engine but this thought occurred to me: The main problem with Nitrous is that it causes an ultra-lean condition i believe. The answer is "wet" injection to add more fuel at the time of the boost. Gurtner carbs as found on a Motobecane have an enrichment circuit rather than a choke. It would seem that "choking" the engine at the time of boost would maintain airflow unlike a standard choke yet dump extra fuel into the mixture. From there I suppose the "starting jet" could be drilled out for further tuning if necessary. Many Mikuni's also use starting jets. Note that I'm not sticking a bottle of that poison on my engine but any thoughts?