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Since my begin in RC world (in the early 90's), i 'm a Ko Propo Ex 1 addict.
I'm not really a collector but with the time i get 3 models of this line; an AM, FM and a Mars.
I always using my old Mars, i upgrade it with 2.4ghz device, which it allow me to get the smaller KR411fh receiver in my actual cars;
and bring back to a fm modul for my vintage cars




pics of my older models to come....

You are in good company, my friend.

I too, love the Ko EX-1 model. I have had nearly every one save for the 2000 edition and the original AM

Green Gripped FM Version
Precious- I had in 1995 because I had a friend from HK have one shipped over.
Mars
Mars-R
EX-1 UR

As of right now I have:
Green Gripped FM Version
Mars
EX-1 UR= which I use.

Looking for a Mars-R, Mars 2000 and a Precious to complete the collection.

I also have the Helios which is "retired".

I do love the EX1, the Precious, Mars..
I have EX1 UR in 27 fm. The only thing I don´t like is how she ´drinks´ the batteries.. I wonder if I get a 2,4ghz module batteries will last longer..

i use a lipo battery, which i charged every 50-60 hours, pretty handy.

where did you get the lipo?

it's a Turnigy 2.65 1C 3S , buy on the HK webshop.

here is the thread I posted before..... enjoy....

http://www.rc10talk.com/viewtopic.php?f=82&t=5886&hilit=ko+EX1

wow! amazing thread, particulary the copy of your old japanese magazine with all the EX1 issues...!
if i had saw it before, i'll post my pictures in it

here is my oldest EX1



it's written EXII on it, but it really look the same as the EX1 of mid 80's...
if someone got info on this issue...

sweet collection works92.

works92 wrote: it's written EXII on it, but it really look the same as the EX1 of mid 80's...
if someone got info on this issue...

believe the EXII was sold as a cheaper model with a 2ch receiver
(skinny long thing, looked like a chewingum pack with only 2 plug sockets on its end)

and start of when they went with the road wheel instead of a steering wheel

the EX1 i raced with in the mid 90's:

I have a Ex1 precious that didn't use for 15 years years. When it took it out of storage , put some fresh batteries in it won't turn on? Any ideas.

I already check and clean the metal tabs for for the battery tray and radio for any corosion. Anybody know what is wrong or experince this? I really want to repair it.

Sorry, i never get any troubles with my KO's.
If the batteries positions and connections are good..., you got to go deeper and disassemble it

Did you use Nimh pack in the past ?

Next to check is the sliding on/off switch. Disassemble the transmitter and give the on/off switch a good blast of Lectra clean or another sprayable alcohol, while operating it. WITHOUT batteries attached.
When the alcohol has vaporized You can apply the batteries and give it a try.