Pilot jet question AS1
 

Getting back into riding after 10 years off. I have a new to me 2010 EC300. Air screw has no effect, can turn it all the way in still runs. Is this too rich needing a smaller pilot jet? Thanks,
Trailrider

Have a search for jetting threads matey. More than likely float height is too high and it still has the standard rubbish needle. N3EG works well in them.

Or RM250 NEDJ. Put one in a mates 10. He was sceptical but now won't shut up about how much difference it made. Try clip 2 from top.

Did the 2010 have a As1 or 2?

Pilot jet question AS!
 

Thanks for the help guys. I will check the float level along with the pilot jet.

Good point Nate. His 10 had as AS2 (top held on by screws). It was supposedly a 6Days but I have heard the transition from AS1 to AS2 wasnt clear between markets.

More importantly check if the needle is the std N1FE. If it is cut it in 1/2 with some stout cutters so you aren't tempted to use it.

I can't overstate this step.

Spend the $20 on a needle , which depending on which style carb you have.

I believe that's N1EF that you meant to say in the statement above. I agree with you about the advice to get rid of it and go to a better jet needle (such as the NECW, or some other recommended needle. )


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This is still funny and awesome advice no matter how many times I see it. They must have had a shipping container full of the mongrel things.

Probably Keihin ship them all with this unless you pay the $43 document fee to change the needle type.

Or a twig approximately the right length that seems smaller at one end than the other. Either way around will be better.

That your carb doesn't react on the As has nothing to do with the float height nor with the needle.

First look what is installed and let us know, then adjust float height and when you do so check float valve. Check how far the slide is lifted by the idle screw.

Turning in the AS all the way should stall the engine.

It kind of does though, when the wrong needle is used, I am looking at you N1ef...
It forces the user to lift the slide too far to compensate for the overly rich first section in a vain attempt to get it to idle.
This then lifts the slide past the effective range of the air screw.

Pilot jet story
 

Here is the whole story. The jet needle wore out on my stock carb. I replaced it with a counterfit Chinese carb.The pilot jet was clogged up even though it was clean when I put it in Jetting is JD jet kit. Adjusting the float bowls was no help. Poor weather has slowed me down.
I plan to reinspect the pilot jet and main jet, and give the whole carb a good cleaning, I think the commies left pieces of metal inside.
If this doesnt work I will either buy a real carb from JD ($300) or part it out.
Any suggestions appreciated.
Trailrider