The smaller the cylinder, the smaller ther jets. That is part of the reason that the C-10's have trouble, they are pretty small jets controlling each of our little 250cc cylinders fuel. Take a look at a jet for a 26cc weed eater or a 50cc moped, you can hardly see through them when they are clean and new. That little hole plugs up really easy. The carb on my 300 Inch six cylinder ford had a jet that looked like it would pass grains of rice, and it never plugged up.