It's possibly just some crud or water in the carburetor float bowl.
Drain the carb and add some fresh fuel with a good fuel system cleaner
additive like Seafoam.

Worst case some foreign material is partially blocking the
carburetor's idle passageway.

Good luck,

John L.

Sent from an iPhone!

On Jul 5, 2009, at 4:08 PM, "rhartman911" <rhartman911@...> wrote:

>
>
> Just bought a EU 2000i and a companion after 1 hr of running the
> companion's idle goes up and down with no load attatched to it I
> turned off the eco throttle it ran fine.it does smooth out when you
> adjust the choke could someone tell me whats wrong with it?.I'am
> going to drop it off at a Honda repair shop hopefully they don't
> give me a hard time since I didn't buy it from them and Honda will
> back their