50cc Scooter Starting - Kawasaki KLR 650 Forum
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post #1 of 16 Old 04-08-2012, 05:42 PM Thread Starter
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50cc Scooter Starting

Not exactly a KLR650, hence in the "Off Topic" forum.

I got my wife a used 50cc Chinese scooter. Ever since we got it, it's been hard to start. It eventually does and, once it warms up, it runs great. If you start it several times throughout the day it does fine, but when it sits for a week or more, it's hard to start.

The hard starting is accompanied by a fair amount of smoke (I'd describe it was "white") coming out of the exhaust. Once the smoke clears up, the idle smooths out and it will take full throttle.

Any of you guys have one of these things and are familiar with it that might be able to tell me what to look for to fix this problem? My wife wants to ride it to work (6 blocks away) but she's afraid she won't be able to get it started to get home.

It might be a mechanical issue or it might just be my starting technique. It didn't come with any kind of manual. It doesn't have a manual choke.

I've tried cranking it with my hand off the throttle and that doesn't work. it doesn't seem to start to catch until I start messing around and twisting the throttle, but I don't know if maybe I'm slightly flooding it or something.

Any ideas would be appreciated. It has about 1100 km's on it. I'm thinking perhaps valves need to be adjusted?




Last edited by planalp; 04-08-2012 at 05:44 PM.
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post #2 of 16 Old 04-08-2012, 05:46 PM
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sounds like a beemer on the side stand. the oil leaks into something or other and when it starts it blows white smoke for a while untill it warms up.

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post #3 of 16 Old 04-08-2012, 11:19 PM
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I assume it's a 4 stroke, make sure crankcase oil isn't diluted with gas and overfull, might look at spark plug to see if it has carbon build up from burning oil. I like to use a straight 30w oil in small engines when weather is warm, seem to burn less than multi weights. Just some thoughts.
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post #4 of 16 Old 04-08-2012, 11:24 PM
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I'd try the simple stuff first.. New plug and several glugs of Seafoam, and a good ride to let everything work..

If not, post up on Battle Scooters on ADV..
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post #5 of 16 Old 04-08-2012, 11:38 PM
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Another great resource for anything chinese with wheels is chinariders.net
Excellent folks over there, it's a very family oriented helpful website devoted to keeping your chinese toys running. I've got a few chinese machines as well, once they are all dialed in they can be a lot of fun! Some folks with lots of scooter experience as well.

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post #6 of 16 Old 04-09-2012, 12:00 AM
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Oh, meant to say as well, just off the top of my head I'm guessing the hard starting has something to do with your enrichment system... Some scooters use an automatic system and I'm guessing yours isn't working. http://www.towingdelivery.co.uk/Scoo...tEnricher.aspx

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post #7 of 16 Old 04-09-2012, 06:07 AM Thread Starter
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Quote:
Originally Posted by 650Stew View Post
Oh, meant to say as well, just off the top of my head I'm guessing the hard starting has something to do with your enrichment system... Some scooters use an automatic system and I'm guessing yours isn't working. http://www.towingdelivery.co.uk/Scoo...tEnricher.aspx
Thanks for the article, 650Stew. I saved it for future reference.

I believe it was you who correctly deduced that it needed an ignition control box when it suddenly died on me shortly after I got it. $9 later for a new control box and it was on the road again.

I'm going to try starting it and running it every day for awhile and see what happens. If that doesn't limber things up, I'll check the enricher.

The best part about these scooters is that parts are practically free. I looked and a new electric choke is around $10. You can get a whole new carburetor for $25.




Last edited by planalp; 04-09-2012 at 06:19 AM.
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post #8 of 16 Old 04-09-2012, 06:10 AM Thread Starter
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Originally Posted by Paper View Post
I'd try the simple stuff first.. New plug and several glugs of Seafoam, and a good ride to let everything work..

If not, post up on Battle Scooters on ADV..
Sounds like good advice. I put a new spark plug in it last year. I filled the tank with fresh gas and Seafoam before storing it for the Winter but I only took it out and started it once a month and then only rode it up and down the street a few times.

I'll take your advice on running it more. Maybe that's what it needs because in the last year, or maybe even two, it hasn't been operated much. I think I'll make it a point to start it every day and ride it around for more than 5 minutes at a time and see what happens. The thing's actually pretty fun and hauls my 280 pounds around amazingly well for such a small machine, although I've learned momentum can be your friend when it comes to steep hills.




Last edited by planalp; 04-09-2012 at 06:22 AM.
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post #9 of 16 Old 04-09-2012, 08:47 AM
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Quote:
Originally Posted by terry_1956 View Post
I assume it's a 4 stroke, make sure crankcase oil isn't diluted with gas and overfull, might look at spark plug to see if it has carbon build up from burning oil. I like to use a straight 30w oil in small engines when weather is warm, seem to burn less than multi weights. Just some thoughts.
Ditto on checking for gas in the oil if it's a 4 stroke. The chinese machines are pretty famous for having some left over crud from manufacture in the fuel systems that has a tendency to work it's way down and foul up the float needle seat resulting in flooding. Usually you'll notice a gas smell and the overflow drain tube dripping first though... I'm not really familiar with the scooter carbs though so I don't know how they are set up.

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post #10 of 16 Old 04-15-2012, 10:49 AM Thread Starter
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Originally Posted by 650Stew View Post
Oh, meant to say as well, just off the top of my head I'm guessing the hard starting has something to do with your enrichment system... Some scooters use an automatic system and I'm guessing yours isn't working. http://www.towingdelivery.co.uk/Scoo...tEnricher.aspx
You were right again, man. Thanks. I didn't bother testing the old one, but just ordered a new electric choke for $9. I put it on this morning and the thing starts right up with no smoke or stalling. Thanks for the idea!



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