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Messages - bobulator

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zx50 / Re: Motor starts then dies in 5-10 secs
« on: March 11, 2012, 02:10:22 AM »
Well I got to work on it today, this time took the carb completely off, removed the choke (the manual calls it a auto bystarter?), cleaned all the pipes and tubes with carb cleaner. Checked the choke, 4.2 ohms, so OK, then applied 12v, and the pin moved out from 20mm to 24mm length, so know it worked fine. Put it all back together and after filling the bowl, it started right away and stayed running! I'm really impressed with the quality of this Kymco, far superior to my first scooter, a Vento Zip 50cc, which I thought was one of the better Chinese clones. Really no comparison in quality. Zombie, thanks for your help!

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zx50 / Re: Motor starts then dies in 5-10 secs
« on: March 05, 2012, 02:01:10 AM »
Thanks! I looked at the VIN, it's a 2004, but only has 771 miles on it! Always stored in a garage, so truly like new. I ended up buying it from him for $500.

I took the carb pretty much apart (not completely off the scoot), and took everything out, cleaned extensively with carb cleaner, and reinstalled it. It started right up and stayed running! I took it out for a ride, after warming it up, took it up to about 70 (kmh, not mph!) so I guess it has been derestricted. Parked it and did a few other jobs around the house, then went to restart it maybe 2 hours later, and first it started but died after 10-15 sec, then after that it was like before, would run a few sec before dying, and if immediately restarted wouldn't fire at all. I played with the idle mix screw and idle speed screw a bit, seemed to make some difference, but never got running properly. Finally I just decided to spray some ether into it to get it going, and it started up fine and continued to run, after 5-10 sec I tried to rev it and it bogged, so I let it warm up another 10 sec or so, and then it took off fine and I went for another ride.

I'm really kinda stumped, unless another bit of something got dislodged into the cold start circuit. Does anyone know exactly how it works? Is the tiny tube pulling gas up from the bowl for it? When I sprayed cleaner thru it, it came out one of the holes on the front of the carb!

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zx50 / Re: Motor starts then dies in 5-10 secs
« on: March 04, 2012, 02:01:30 PM »
OK, thanks I'll try that. If we get it going, they want to sell it, any idea what a really low mileage ZX50 would go for? He said he paid $2100 a few years ago for it.

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zx50 / Motor starts then dies in 5-10 secs
« on: March 04, 2012, 02:59:39 AM »
Hi all,

I'm a noob here, but had scoots for a few years, and I'm trying to help a friend who has a couple year old zx50, with only 750 miles on it! He's let it sit quite for quite a while, and now can't start it. I figured a clogged main jet, and sure enough it was; cleaned it and it will start fine. Problem it wont stay running more than 5-10 sec. If you try to restart it immediately again, it won't even fire, until you've let it sit 5 minutes or so, then it will again run a few sec at a normal idle then die.

I thought maybe fuel starvation, checked filter, seems OK, and disconnected the line at the carb, started engine, within a few secs fuel started dumping quickly out the line, so I think fuel is getting to the carb OK. When I unscrew the bowl screw, gas comes out, so no problem there. In the 5 sec or so it will idle before dying, if I goose the gas, the engine immediately dies, so I'm guessing there is gas in the carb?

Not sure, Probs with the auto choke? Idle needle or something in that circuit? CDI? Never had one of those so not sure what symptoms they give, however with only 750 mi on the scoot, doubt it is a wearing out issue?

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