I recently came across a Japanese made EX-1 KO RADIO. When I bind it to the reciever the steering works great, but the throttle doesn't work on the car. On the LCD screen of the radio it indicates that the throttle is moving. What do I do in this situation? Buy a new grip? Send it to Japan? Any advice please. Thanks in advance....race clean!

The v1 had a lot of problems with bad throttle pots.Depending where you purchased your radio, It may have to go to Japan.
Ie, if you live in UK or USA and got the radio from Hong Kong then its back to the land of the rising sun.

Very well...about how much will it cost to repair it?

Just asking because you didn't mention it in your original post, did you recalibrate the esc after installing the radio?

Also you can try plugging in the esc to the battery port and your steering servo to the throttle port to know for sure the throttle pots are working and your getting signal to the receiver.

Thttp://www.rctech.net/forum/radio-electronics/588488-new-ko-propo-radio-74.html
This is on the other thread Have a read.

This radio is awesome if it works I had mine for a while this damn radio got gremlin lol... You just don't know when it will acts up it's just frustrating.. I'm going back to use my helios and I purchased the RF903 module so I can use the same reciever..