I have personally pushed the limit going over the 3 gallon mark, but in my opinion is too risky. I think 2 gallon mark should be the right time to change the rod.

Good evening, I'm having a problem tuning the Picco .21 otto engine. It idles good but when I give it gas it stays at a high idle for about 5 to 10 seconds and then it will come back down. It seems like it stays at a high rev for too long.

Hi Guys, I know the 2120 pipe is a substitute for the 2069, is there any real difference between the 2?