Maintenance & Technical > KX500 Original
Jetting!!! Again and again and again!
KXcam22:
Check back in this thread for an easy way to set your float level. Cam.
martinfan30:
OK, N424-21 is the pilot series. What is the mainjet series #?
Hillclimb#42:
I was just recently educated on the ratio changing. I run 44:1 and have for at least 8 years, but it blew my mind to learn this: If you "lean" the ratio out like 32:1 changing to 40:1, you are actually fattening the air /fuel mixture. Lean and rich are really air to fuel terms, oil ratio is oil ratio. Less oil in the mixture= more fuel in the mixture. Am I making sense?
Johnniespeed:
Hillclimb#42
I had heard that from a couple of guys, but didnt know them well enough to believe them. I know that you have been up the hill a few times ( or is that over the hill ? LOL) and I trust your word, based on your experience.
John
KXcam22:
That is true. On some lean ratio oil bottles like amsoil it even says the words "leaner jetting may be required". It makes sense: the carb meters a given amount of fluid per air with the fluid being made up of fuel & oil. The ratio of fluid to air is constant (stochiometric ratio of 1:14 approx). The oil is part of the fluid but doesn't count as part of the mixture (the part that makes power) so taking away oil means that the missing part of the "fluid" is made back up by fuel. Then you have more gas in the mixture than before, making the mixture richer. Hope this makes sense. Cam.
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