Re: Still getting really bad gas mileage.
Buying jets is somewhat a crapshoot. You would need to buy a large selection of them because the majority of manufacturers dont follow a set standard. It's far more accurate to solder and drill.
However, i remember seeing the jets on gasbike's website.
I soldered mine with a cheap plumber's torch and regular rosin core electrical solder. It doesnt really matter what solder you use. The key is to get it clean, and apply solder to the hot part, not in the flame.