thefuzzclub

what is the basic guideline in putting a carb restrictor?
i plan to put one in my broke-in/tuned novarossi s5 engine for practice purposes. what is the basic adjustment should i consider in the needles when i put one?

Im2lazy

With a restrictor you will have less air entering the carb, so therefore, you will have more fuel than you need, and so you should lean the carb a little. But don't do any tuning until it has seen several minutes around the track of course.

thefuzzclub

noted with thanks.

Racing4Evo

iTrader: (2)

I used carb restrictors on my Picco XP and I didn't have to change the needle settings. The restrictor is slowing down airflow.

tkhoo

iTrader: (45)

what is that for and can I have the picture?? Thanks.

x_man

It's a plastic insert, for the carb. There are actually a few inlet hole sizes to choose from.

The restrictor as it's name suggest, it restricts the air flow into the engine.. making it more fuel efficient but loses some rpms though.

Those engines with a big bore carb, like the NS12, comes with this kind of air inlet restrictor.