Look up a couple posts.. Here it is

Hey Malik, I just checked out the MMods O rings - they look good. I went to the fuel tubing because the factory O rings kept drying out. Ended up with a blockage from all the shredded rubber sludge off the O rings blocking the needle jet. As far as size of tubing goes, I just get the standard tubing from my local hobby shop, I am guessing it is the thinner of the two sizes. I find it works really well, and gives a nice ¨tension¨ to the needles so they are easily adjusted but not too tight.