Aero 50 jetting

[elnene2k]

Hi all,
I've been searching to see if I can find my answer but can't seem to find it...

I need to know if jetting is beneficial on my 83 Aero 50...Will different size jets do me any good or should I just leave what is there?

[Kenny_McCormic]

Jetting is used to adjust how hot/cold the engine runs by adjusting fuel to air ration, you only need to play with jets if the motor is being upgraded. Do a plug chop and see how things are.

[spreer']

Jetting isn't trying to adjust for engine temp, however that can change with jetting. Jetting instead is ensuring that there are 14 parts air to 1 part fuel as best you can, carbs are not perfect. If I had my choice I would have the European version of our Ruckus, it is fuel injected. There are many variables in a motor with a carb like, throttle position, rpm, intake size, etc. In most larger carbs, you can adjust the carb in 5 ways without modifying it. There is an idle jet, idle air mixture screw, main jet, needle, and needle position. You probably can't change the idle jet in this carb, I know you can't on the sprees unless you pull one out of another carb. I don't think they sell the idle jet/tube. The idle jet and screw take care of close throttle to 1/4 open and keep the engine from dying if you let off the throttle on an engine with an automatic clutch. The needle in combination with the main jet control the midrange. A fully opened throttle is controlled by the main jet. An engine will destroy itself if to lean. An engine will run like dog s*** if it is too rich. This is a very basic explanation and if you are adding a lot of air, I would move quite a few jet sizes richer. You can always lean it out from their and jets are cheap. Raising the needle will richen the midrange, lowering into the carb will lean it out. I suggest you do some reading on jetting in general and also on two strokes specifically. It will help you gain a better understanding and appreciation for fuel and air mixing without a computer or a fuel pump.