My New 'family bike' (Kymco ZX50)

burnt_toast · Post by **burnt_toast** » Sun Apr 19, 2009 11:15 pm

Yess indeed, all the above is correct. Been workin for a shop and we sell Kymco. they let me take a ZX50 home one day for a loaner felt like bloated elite with much better brakes lol

Dac · Post by **Dac** » Thu Apr 23, 2009 8:33 pm

i think i killed it....

Went out riding today. I wasnt keeping an eye on the miles, but i know i had over 25 easy. On my way back twords my house i decided to stop at a friends house (about 7 miles outside of town). The kick start "stipped" (turned out to be just fine.). Had to use a battery charger to get the thing going. So i raced home with the gas gauge on 'E' the entire time. Barely made it home.

So, get home, fix that. Ride over to another friends house (maybe like a mile away). Just about there and i notice a small drop in speed. I was going slow so i hardly noticed it.

Parked it, went inside. Came back out 15 minutes later and the thing wont start. Kicked it for a good 15 minutes or so and nothing. Pulled the plugged, and it looked fine. Cleaned it up, Threw it back in. No change. Just a few back fires out the exhaust.
As im kicking it im starting to realize the kick is getting easier and easier every time...

more details coming tomorrow as i pull this bike apart...

Kenny_McCormic · Post by **Kenny_McCormic** » Thu Apr 23, 2009 11:09 pm

Lack of oil or running lean?

burnt_toast · Post by **burnt_toast** » Fri Apr 24, 2009 12:04 am

you didn't mention filling back up, out of gas?

would suck if its fried..

Dac · Post by **Dac** » Fri Apr 24, 2009 1:30 pm

yeah its got gas.

Ok, so i pulled it all apart to find an Great looking piston, awesome looking rings, and a perfect cylinder...

The piston has got a little carbon on the top of it. but the rest of it looks amazing. The rings look brand new and the cylinder looks like it only has a few miles on it. (reflections in the pictures make it look bad. But in person its much better) Im totally amazed that a bike with 12'005 km's on it can be this nice on the inside.

Still confused at what the problem is i put the motor back together and decided to kickstart it to see if i notice anything odd. Kicked it once and it fired straight up.
So im all excited and i throw everything back together (all the body panels and the seat pan). Go to take it for a test ride....

It wont start....

It ran fine when i had it all opened up. but once i put it back together it dont want to start. i dont know if something is shorting out somewhere or what but this is going to be a pain in the * to find/fix.
[im just glad the cylinders fine.]

mash · Post by **mash** » Fri Apr 24, 2009 5:07 pm

sweet Kymco, I have been thinking of getting one too, maybe an agility 125?

Kenny_McCormic · Post by **Kenny_McCormic** » Fri Apr 24, 2009 7:19 pm

You see Dac, running a motor with proper amounts of oil, air, fuel and a good air filtration system will do that.

burnt_toast · Post by **burnt_toast** » Sat Apr 25, 2009 12:03 am

yup totally normal

Dac · Post by **Dac** » Sat Apr 25, 2009 5:50 pm

i cant get this d*** thing to start.

I took the seat back off and it still wont start.

Its got awesome spark, and a good plug. I guess cleaning the carb is next.

HondaCharlie · Post by **HondaCharlie** » Sun Apr 26, 2009 9:29 pm

AAAHHH get it away! Get it away!! Forms fingers into a cross

Dac · Post by **Dac** » Mon Apr 27, 2009 5:27 pm

go outside today, working on other bikes. decide to give it one kick "just to see" and it fired right up.

I think there is a short in the wiring somewhere.

Dac · Post by **Dac** » Thu May 07, 2009 10:54 pm

i messed with this b**** all day.

I hate this random * problem! Its like, every time i think i got it. i ride it. Everything is good. turn it off, turn it back on like 50 times. its all good. then all at once, nothing. like it dont even want to try. Tear it apart, find no problem, put it back together then it runs again!

its f***ing random as *.

Also, anywhere know where the * to find the year on this thing? I want to go get it all legal but i cant find the year on the thing.

burnt_toast · Post by **burnt_toast** » Fri May 08, 2009 11:08 am

sounds like cdi man, those can cause intermittent problems and we've seen it happen on several of our kymcos

vin should be under glovebox area i think

mousewheels · Post by **mousewheels** » Fri May 08, 2009 2:42 pm

sounds like cdi man, those can cause intermittent problems and we've seen it happen on several of our kymcos

Little heat on the CDI (hairdryer) could help isolate the problem. When done with that, try the coil too. I PM'd you about the possibility of stator coil that excites the CDI too.

Good luck with that problem, intermittents are a bear.

BTW: Some Kymco electricals look compatible to Honda. Am curious if your CDI looks compatible.

Dac · Post by **Dac** » Sat May 09, 2009 5:26 pm

this is a little different then what im use to seeing...

any clue on sources?