Got a brand new 2002 400ex, was going to go for a first ride tommorow, so I did a shake down and here's what is happening:

1) It starts fine on full choke
2) When warmed up for a few minutes, it runs fine
on 1/2 choke and will idle smoothly,
3) When switched to choke off, it dies, (stalls)
4) Will run on choke off if given gas, but when
you let off the gas or pull the clutch and let
the RPM's go down, it dies.
5) When you give it about 1/2 throttle, with the
choke off, it runs real rough...

The bike has never been ridden. It came with 1/2 tank of gas from the dealer.

My first thought was bad gas or spark plug gap???

Would like to get it up for a ride tomorrow with out having to take it back to the dealer for a look-c

Tks in advance for the help.[img]i/expressions/face-icon-small-confused.gif[/img]

 

check the air filter, if thats clean, your air/fuel mixture is set wrong

 

Ok...can you take a rookie threw it...where is the fuel mixture screw? How to set...

Air filter is clean, never been ridden

 

You need to look at the air filter, they have been known to fall off when they are new, and that sounds like yor problem.

If you have actually looked at the filter then you have carbuerator problems and taking it back to the dealer is your best bet.

 

I got it!!! 1/4 on the idle and 3/4 on the air/fuel. Go figure? Will update after my first ride tom.

 

What you have is a classic case of the quad or motorcycle setting for some time with gas in the carb. What happens is that the gas dries up after being run and then not run for some time( 4 or more weeks ). When the gas dries up it will clog up the pilot jet or slow speed jet. You will have to take off the bottom of the carb and clean out the pilot jet. Being that you got it new I would take it back and have them do it being that you are new to quad or bikes, so you say.
This is why you drain or put some stabalizer in the gas if the machine is going to set for some time. We see this alot in the spring on street bikes from owners that don't winterize them correctly.

 

Yes, put some sta-bil in that tank when you store it.

Chet

 

If you don't mind, what did you pay OTD?

 

It was the kill deal, kill, 4500 OTD, got it at the motorcycle factory just outside of Manassas VA...Last
one they had...but I'm sure they made it back on all the other stuff I bought afterward!

 

Great, thanks! That is a great deal! Congrats. on your purchase.