<span style=”font-size: 14px; line-height: 1.5em;”>My kart came with 170/52 jets in it. </span>I’m just looking for a decent (safe) starting point. If I look at the Honda CR125R manual, I see a jetting chart that says for a standard day at sea level the stock jetting of 175/52 applies. I’ve poked around and found a couple of sources for shifter kart jetting charts and both suggest a pilot jet size of 58. The main jet recommendations (same conditions as above) are the same. 6 sizes of pilot jet difference are probably more of a difference than can be justified by humidity (which Honda’s chart ignores), or fuel/oil mix, or other factors. Does the stock Honda jetting tend to be lean on the low end? Is it typical to jet the pilot bigger than on a bike?