I just recently bought a Evo2 5 port engine. This is kind of a dumb question but, in the plastic carb there is a machined piece that fits inside the air inlet. Is this a carb restrictor or is it to be used at all times? I was just wondering if I'm suppose to take it out for more power? It looks like it is around 5.5mm.

Thanks in advance,
Shawn

Yeah, that's the carb restrictor. If your racing doesn't have rules for that, you can take it out for more power, at the cost of fuel economy.

Ok great! Thanx for the reply