KymcoForum.com
Scooters - 125 to 300 => People 250 => Topic started by: spooker on August 19, 2010, 02:28:33 AM
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So my P S 250 has about 5,000 miles on it, and I've just run into my first problem. I've noticed for a while that when the bike is warming up, it seems like it has been revving a little low. Two weeks ago, it actually stalled while it was warming up, after running for about 8 seconds. In the past week, the problem has gotten worse, and it now sounds like it's going to stall for about a minute when you start it after it's been cold, unless you give it a little gas. Two nights ago, the bike was cold and I had just pulled away down the block and came to a stop sign; when I stopped at the stop sign I actually stalled.
So, I think it's idling too low and I was planning on adjusting the idle screw on the carburetor a little bit. This is the first time I've worked on my bike besides basic maintenance, so I wanted to see what you guys thought first.
I don't know if this is related to my first problem, but there's one other strange thing I've always noticed with my bike. When I ride it for a while, and I stop to go into the store or have a meal or something, and it cools down a bit, and then I go back out and start it up again, the rear wheel sometimes spins when it's still on the center stand and I haven't given it any gas. Sometimes, it gets going quite fast, and I have to put on the rear brake before I take it off the center stand. If I let it sit on the center stand long enough, and the let the choke go down, it stops. I never worried about this too much before. Should I? Anyone else experience this? Thanks!!!
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I don't have your model but that sounds like air idle screw setting. Should do air filter and carb clean also if you havn't allready. Good luck.
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When I ride it for a while, and I stop to go into the store or have a meal or something, and it cools down a bit, and then I go back out and start it up again, the rear wheel sometimes spins when it's still on the center stand and I haven't given it any gas. Sometimes, it gets going quite fast, and I have to put on the rear brake before I take it off the center stand. If I let it sit on the center stand long enough, and the let the choke go down, it stops. I never worried about this too much before. Should I? Anyone else experience this?
That's relatively normal. Often, the auto-bystarter will cause the engine to rev high enough to engage the clutch (mine (P250) tends to do this more as the weather gets cooler; when it's hot out, not so much).
Your stalling may be due to a small leak in the air intake, but you might first try adjusting the idle slightly higher. Around 1800 rpm is optimal, but 2000 rpm isn't unreasonable. If you have to go above that to keep from stalling, you might want to check for leaks in the air intake. You can do that with a cheap can of starter fluid (ether), spraying in areas around the intake while the engine is idling. Using the tiny straw that comes with the starter fluid, you can pinpoint the general area of a leak. If the engine momentarily races where you spray, you found it! Tighten/replace the clamp or plug the leak, and hopefully the problem is solved.
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Thanks for the quick responses guys.
I just replaced the air filter a few weeks ago. I'll start by adjusting the idle screw, since I think that's within my meager capabilities, and let you know how it goes.
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Check/adjust the intake and exhaust valves. Adjust your idle higher until the rear wheel moves then turn back a little bit. You have to adjust after you warm up your engine. You might also have gas vapor lock. Also change the spark plug!
http://modvespa.com/how-to-adjust-your-valve-on-kymco-people-250-scooter/ (http://modvespa.com/how-to-adjust-your-valve-on-kymco-people-250-scooter/)
I posted this on scootdawg.com
http://scootdawg.proboards.com/index.cgi?board=200cc&action=display&thread=32147 (http://scootdawg.proboards.com/index.cgi?board=200cc&action=display&thread=32147)
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Mine stalled many times on the way to work and home couple weeks ago (on highway and local roads). I thought it's "vapor lock". I did a gas cap vent on the Kymco People 250. No stalling or loss power afterward. Check all vacuum lines for kinks.
http://picasaweb.google.com/Anhoa76/2006KymcoPeople250#5457755471130324050 (http://picasaweb.google.com/Anhoa76/2006KymcoPeople250#5457755471130324050)
http://picasaweb.google.com/Anhoa76/2006KymcoPeople250#5457755472968012018 (http://picasaweb.google.com/Anhoa76/2006KymcoPeople250#5457755472968012018)
I have to fill up the gas every 200km = 125 miles, but still has .5 gallon left in the tank for about 30 miles.
Anhoa
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Everyone knows I am quick to suggest vapor lock. The key in this one (for me) was spooker saying "... Two nights ago, the bike was cold..."; typically, vapor lock happens during the hotter daytime temperatures, and even then, doesn't usually manifest itself quite so quickly (unless it's REALLY, REALLY hot!).
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Any thoughts, My little hot rod shuts down when running twice the speed it was ment to, do you think the air vent in the cap could contribute to this. (I know wrong thread but)
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..art..what thread were we discussing that on??
..i'll post some thoughts there...
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So I turned the idle screw about 180 degrees. It's running like a charm. I didn't predict how easy it would be since I've never worked on a carburetor before. Also, I hadn't yet noticed the easy access panel, and was thinking I would need to take out the whole "met-in" (what does that mean?) bucket. I guess they make our carbs easily accessible, since we're always working on them huh?
Thanks for the help people, I hope this is the last we've heard of this problem...
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"met-in" (what does that mean?)
..it's taiwanese for "Stuff fits under seat, stupid"...
;D
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Didn't realy have one just the gas cap thing came up here and i've been thinking about it (OH! OH!) :D. Try the poeple 50 anywhere threads. My modern dirt bikes all had a vent of an 1/8" or more and did not run well if plugged with dirt.
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Didn't realy have one just the gas cap thing came up here and i've been thinking about it (OH! OH!) :D. Try the poeple 50 anywhere threads. My modern dirt bikes all had a vent of an 1/8" or more and did not run well if plugged with dirt.
Um... did you start typing before reading, again? ;)
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;D
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:D All the time. At least we have a success story here.
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Met-in box in Taiwanese = Pet Carrier in Italian = underseat storage area = tool box = food warmer
(http://danilogurovich.files.wordpress.com/2008/11/no_pets_sq.jpg)
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I also suggest you add i oz of Seafoam per gallon of gas. It keeps the carb and valves clean, and displaces water.
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Well obviously I know what it refers to, since I used it correctly in a sentence. Let me rephrase the question: what is the linguistic derivation of "met-in"? Any idears?
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Forget it, Jake. It's Chinglishtown.
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I googled met-in, and the fifth one down was "we met in a bar". Works for me.
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I googled met-in, and the fifth one down was "we met in a bar". Works for me.
..WOO-HOOO!!..ME TOOO!!!...
;D
..seriously tho...i don't think anybody here knows....
:-\
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So apparently the problem is not completely solved. I think turning up the idle screw kinda masked it, but didn't solve the underlying problem, because today it felt like it almost stalled as I was pulling down the block from my house. Any ideas? Should I clean the carb????
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Any ideas?
Yes; I offered mine a few days ago.
Did you try what I suggested?
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No, not yet. I don't know what an air intake is or where to find it. The shop manual refers to an intake manifold. Is this it?
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The black plastic ductwork on either side of the carb -- one end goes to the air filter, the other end to the intake manifold. A leak in either of these can cause the engine to run rough or stall at low speeds.
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Bump!
Still having problems with this. To recap, the problem is that when the engine on my P S 250 is cold (first couple minutes or two of riding), and the auto-choke has come down, the bike sometimes idles low, and occasionally stalls. It doesn't happen every time, and once the bike gets warmed up it's fine.
The solutions I've tried so far:
1) Turning up the idle--at first it seemed to fix it, but it didn't. I don't think I can turn it up anymore, since it's already revving pretty high once it's warmed up.
2) JPrestonian said it might be the air intake, so I tried his trick of spraying ether around those tubes on the carb and seeing if the engine revved. They didn't, but I tightened the clamps anyway.
3) The guy at Autozone said I probably had debris in my carb jets, so I got some Seafoam. I've run a little bit through there, and haven't seen any improvement, but I'll keep using it.
Any other suggestions? I'm considering taking the plunge and bringing it to a professional, and the nearest reputable one is 80 miles away. I want my scoot to work perfectly! Could this potentially be a warranty issue? If so, I should take it to a mechanic soon, since my warranty runs out in 3 months. Thanks!
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Did you try setting the air idle screw,might be a tad rich if stalling.
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Bump!
Still having problems with this. To recap, the problem is that when the engine on my P S 250 is cold (first couple minutes or two of riding), and the auto-choke has come down, the bike sometimes idles low, and occasionally stalls. It doesn't happen every time, and once the bike gets warmed up it's fine.
The solutions I've tried so far:
1) Turning up the idle--at first it seemed to fix it, but it didn't. I don't think I can turn it up anymore, since it's already revving pretty high once it's warmed up.
2) JPrestonian said it might be the air intake, so I tried his trick of spraying ether around those tubes on the carb and seeing if the engine revved. They didn't, but I tightened the clamps anyway.
3) The guy at Autozone said I probably had debris in my carb jets, so I got some Seafoam. I've run a little bit through there, and haven't seen any improvement, but I'll keep using it.
Any other suggestions? I'm considering taking the plunge and bringing it to a professional, and the nearest reputable one is 80 miles away. I want my scoot to work perfectly! Could this potentially be a warranty issue? If so, I should take it to a mechanic soon, since my warranty runs out in 3 months. Thanks!
You have outline my exact steps in my problems. I had a vacuum leak. I just read you can use WD40 to spray the vacuum tubes. When you spray the tubes individually and when it effects the idle, that's the one.
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So, Techguy, do you think I have a broken vacuum line?? Where are the vacuum lines, so I can try the WD40 test? Thanks.
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Could this potentially be a warranty issue?
..yes it should be, if your scoot is still under warranty...
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If this is warranty... I would take it to the dealer. I know its a huge pain in the butt to do so but you are protecting your asset by doing so. See if you can make an appointment for same day service. Drive, drop the scoot (heck ride if it's just an idle issue like mine was, I rode almost 1,500 miles with my idle issues... two rallies and a summer) go off and do some errand or hang around town, check back in an hour or so and see what they say.
Don't let them lolly-gag much more than that. They should respect your time too. Be honest, let them know that you coming to there shop isa 200 mile trip and dropping it on one day and coming back in a week is not an option for what could be a an hour or labor. Maybe even have then see if they can't talk with the Technical Advisor at Kymco ahaed of time.
What have they looked at already?
Where do you live... where is this dealer?
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..there are some dealer servicing horror stories here..
..but there are some dealers that will back their products as well..
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So my P S 250 has about 5,000 miles on it, and I've just run into my first problem. I've noticed for a while that when the bike is warming up, it seems like it has been revving a little low. Two weeks ago, it actually stalled while it was warming up, after running for about 8 seconds. In the past week, the problem has gotten worse, and it now sounds like it's going to stall for about a minute when you start it after it's been cold, unless you give it a little gas. Two nights ago, the bike was cold and I had just pulled away down the block and came to a stop sign; when I stopped at the stop sign I actually stalled.
So, I think it's idling too low and I was planning on adjusting the idle screw on the carburetor a little bit. This is the first time I've worked on my bike besides basic maintenance, so I wanted to see what you guys thought first.
I don't know if this is related to my first problem, but there's one other strange thing I've always noticed with my bike. When I ride it for a while, and I stop to go into the store or have a meal or something, and it cools down a bit, and then I go back out and start it up again, the rear wheel sometimes spins when it's still on the center stand and I haven't given it any gas. Sometimes, it gets going quite fast, and I have to put on the rear brake before I take it off the center stand. If I let it sit on the center stand long enough, and the let the choke go down, it stops. I never worried about this too much before. Should I? Anyone else experience this? Thanks!!!
..most of these actions are commom...some relavent to temperatuer and weather conditions...
..my scoot runs pretty consistant..
..but not the same..every day...
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My scooter consistently runs rough, sounds like it's going to die, and sometimes does die, under specific conditions. It's more than the vicissitudes of daily existence, there's something going on... :)
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..first really technical question would be...
..have you done any plug chops to confirm what your fuel mix is...
.. at when you are experiencing these failures??
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I don't know what a plug chop is, so no, I haven't done them.
I get the problem after the auto-choke comes down, but before the bike is really warmed up and at it's optimal temperature. It lasts maybe 30 seconds to 1 minute if I keep the bike going.
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..that's about what mine does...upon initial start-up...
but once she's up and running, everything flows....
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...plug chops are when you run your scoot...for a good length of time at a certain throttle position...then kill the engine..immediately stop, holding that throttle position, remove your plug and observe the condition of the firing ring and electrodes...
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So you think I should not worry about occasional stalling? It bugs me in particular, because I commute just about 6 blocks, so I'm usually in that initial warm-up period, except during my 10 hour weekend rides :)
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..well, try adjusting the idle mix screw...
..might smooth out your commute a bit...
..or maybe warm your scoot up a cpl times before striking out....