| The idea here is to see how close the jetting calculators graph compares to examples in real life. Below you can see how close to reality the jetting calculator is and what % from the ideal is considered by riders to be near ideal jetting. For instance in this first example the rider said that the previous jetting was too rich but the graph showed it wasn't unless 0% ethanol gas was used. And only if he switched to 10% ethanol gas for his current setup would his jetting be spot on like the graph shows. (People tend to discount little things that in reality are very important and it was an error for the person who made this database to not ask the % of ethanol in the gas.)   The engine "laziness" this guy mentions at low throttle settings is shown on the graph to be very rich before 3/4 slide opening. I'll bet he fouled a lot of plugs using this needle with too steep a taper for the bike.   In general people's assessment of their jetting isn't worth the powder it would take to blow them to hell. So I can't use most of them. My site tells the right way to assess the jetting but most riders just aren't willing to learn the right way. If the jetting is too rich down low then to them it is just right because it feels "crisp" when they crack the throttle open. Well they have to crack it open because if they very slowly open the throttle they will notice the irregular exhaust note which indicates it's too rich. And if it is too lean then they just excuse it by calling it "lazy". It's like they know it ain't quite right but they aren't willing to label it correctly. [database source] |