KymcoForum.com
Scooters - 50cc => People 50 => Topic started by: mclark999 on July 10, 2015, 06:09:01 PM
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I bought a 2007 People a few weeks ago with just 1000km on it. When I went to test ride it the battery was dead from sitting over the winter. The seller put a new battery on it and it started right up and ran fine for a short test ride. I bought it.
I drove it about 10 miles home and it ran fan running up to 50 mph on the speedo going down small hills and overall seemed fine.
The next morning it started right up but when I gave it throttle, it died. Did this several times and I put it away and took my car. I read through a bunch of posts and found that if I put my hand over the snorkel/air intake I could get it to run and drive. It does die sometimes when it's cold and I have to do the same thing all over.
I also added a couple ounces of Seafoam to the gas in case the gas had been sitting in it all winter and things got gunked up.
I tried the 1/4 turn of the air screw and that made things worse. Put it back to where it was. I've kept riding it and have put a couple hundred miles on it.
Still has the cold start problem and now once it warms up it only seems to be running at about half power under full throttle. It just pulls slowly up to speed but doesn't go over about 30 mph. Definitely not running at full power. When it's cold, it does give full power.
I checked the spark plug wires. They look like new - the scooter is basically an almost new 8 year old bike. It was stored inside and all the rubber parts look great.
I'm guessing that because it sat a lot and was hardly used that the carb or fuel filters are gummed up. I did put the Seafoam in about half a tank ago. Don't know whether to keep riding it and hope the Seafoam eventually works or start taking things apart and cleaning them.
Thought I'd start with the fuel filter first and then move to the carb if that doesn't work. I can't seem to find a definitive answer on here if there is a fuel screen in the tank before the main fuel filter/auto cock. Does anyone know for sure if there is and if so how to clean or replace it?
Any other ideas?
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Discovered today that it runs fine with a full tank of gas and was not with an almost empty tank. Leads me to believe the fuel filter is clogged. I'm going to take the filter out and see what it looks like next time my tank is low.
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Id look after the fuel petcock and clean fuel tank and carb.
Enviado desde mi SM-G920I mediante Tapatalk
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There's no fuel filter on your scooter. Only the autochoke mechanism or fuel petcock (if you installed it).
Mine does run a little worse on a nearly empty gas tank too (especially when riding uphill) and I think it's a common thing, nothing to worry about.
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100% carb clean symptoms. Sitting over the winter, stalling when you give it gas. Get that carb out and clean the idle jet with a very small wire. There IS a fuel filter on the 49cc 2t Kymcos!!!! On the people 50 it is actually attached to the plastic petcock assembly and it is notorious for issues on the People 50, paper filter and when it gets hot it can stop flowing. I install high flow mesh filters on any people 50 that has the oem filter still.
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There IS a fuel filter on the 49cc 2t Kymcos!!!! On the people 50 it is actually attached to the plastic petcock assembly and it is notorious for issues on the People 50,
Damn! Is it on the People S models too? I looked for it on mine and searched the spare parts book and couldn't find it :-[
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Check your plug, you may be running lean. I had a very similar experience.
4 weeks ago, I bought a 2002 People 50 with 1500 km's on the clock. It was still restricted. I derestricted it - variator pin, CDI box with no rev limiter, and the aribox had no filter in it.
My scooter ran absolutely perfectly until I did the derestriction thing this past week. After that, with the new found top end speed (went from 26 mph to 38 mph), it still ran excellently, but I proceeded to do a 10 minute trip at 38 mph, which is essentially wide open throttle the whole time.
There were no indications anything was wrong - until I tried to start it up later. It was just as you described: it barely got started, idled roughly, and the slightest throttle would kill the engine. I eventually got it running smoothly again, and psychologically I blew the episode off as a fluke. I then proceeded to do another 10 minute WOT run, and the entire episode repeated. At that point I suspected the air/fuel mixture, and pulled the plug. Mine was bone white.
I pulled the carb and pulled the main jet, and mine is a #78. I now have a kit on order. You might want to check your plug too.
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Check your plug, you may be running lean. I had a very similar experience.
4 weeks ago, I bought a 2002 People 50 with 1500 km's on the clock. It was still restricted. I derestricted it - variator pin, CDI box with no rev limiter, and the aribox had no filter in it.
My scooter ran absolutely perfectly until I did the derestriction thing this past week. After that, with the new found top end speed (went from 26 mph to 38 mph), it still ran excellently, but I proceeded to do a 10 minute trip at 38 mph, which is essentially wide open throttle the whole time.
There were no indications anything was wrong - until I tried to start it up later. It was just as you described: it barely got started, idled roughly, and the slightest throttle would kill the engine. I eventually got it running smoothly again, and psychologically I blew the episode off as a fluke. I then proceeded to do another 10 minute WOT run, and the entire episode repeated. At that point I suspected the air/fuel mixture, and pulled the plug. Mine was bone white.
I pulled the carb and pulled the main jet, and mine is a #78. I now have a kit on order. You might want to check your plug too.
Part of derestriction is installing a #82 main jet.
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Damn! Is it on the People S models too? I looked for it on mine and searched the spare parts book and couldn't find it :-[
The s filter is actually built onto the petcock, on top of it is a little mesh screen. Pretty good design and unless your bike has seen really nasty gas it should be aok.
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The s filter is actually built onto the petcock, on top of it is a little mesh screen. Pretty good design and unless your bike has seen really nasty gas it should be aok.
Checked the filter in the petcock. It was fine, nothing in it and fuel is flowing strong into the carb.
I also checked the spark plug to see if it was fouled and for rich/lean condition. It's a pretty good tan/brown. Could be slightly rich.
So I guess I'll need to take the carb off and clean it out. Probably just varnished up a little. More to come.
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The s filter is actually built onto the petcock, on top of it is a little mesh screen. Pretty good design and unless your bike has seen really nasty gas it should be aok.
Oh! Good to know that it exists ;D
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Where is a good place to buy a jet kit from? I'm going to put a Tecnigas pipe on it pretty soon so I might as well buy a kit. How big will I need to go above the 82?
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The attached photo is the jet the 2T People carb needs. Many places sell them, including the jetsrus business in the watermark, just make sure you get the correct dimensions.
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...except there is no such thread as an M3.9. The picture should say M4 x 0.7 -- but you can be sure that if the jet you are contemplating buying has the 5mm and 7mm dimensions correct, the M4 thread will be a given.
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I put a new spark plug in it and it helped it run just a tiny bit better. Did the plug chop exercise and the plug is absolutely white. It's pretty lean. Will take the carb apart and clean it and try again. If that doesn't work, I'll get a bigger jet.
Funny, I live in Denver and would have expected it to be rich if anything, but the symptoms pointed to lean.
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I got my jets from jetsrus. The aftermarket main jets work well, but not the idle jets (would not run, if look close, orifice is not the same shape). After buying one aftermarket idle jet, which gave me a lot of trouble, I bought the OEM Keihin and they worked well. Don't expect jetsrus to accept any returns.
I have Tecnigas Next-R pipe on my 2005 People 50 2T, pod air filter, Malossi variator, and re-jetted carb 105 main, 45 idle. My elevation approx 1000' and hot, so Denver will take smaller jets, not that much IMO. Mine may be a little rich, now that it's summer hot. I would be rather be too rich, I run my WOT for long stretches. Runs like a champ, a very nice riding scooter, I love it.
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Chaz35, what kind of speed do you see at WOT? And how long does it take you to get there? Thanks.
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Goes approx 1/4" past 50mph/ 80k, doesn't take very long to get there. I ride with my son-n-law who had Super 8 150 and now has Honda PCX 150. I am down on top speed, but don't have any trouble staying with him, unless we get on roads where he goes 50+.
The Malossi variator is huge improvement, I highly recommend it.
I recently got BBK for it. I don't expect it to go much faster, but should maintain speed going up hills and into the wind a little better. Cheers
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I've run another tank of gas through it and it keeps running a bit better. Adjusted the idle mixture and speed and that's helped low speed performance.
Still need to clean the carb but can tell the Seafoam is gradually helping.
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I've run another tank of gas through it and it keeps running a bit better. Adjusted the idle mixture and speed and that's helped low speed performance.
Still need to clean the carb but can tell the Seafoam is gradually helping.
Thought it was running better. Yesterday on my commute home it died three times. It was very hot out. The first time it died was after sitting idling in traffic for several minutes. When I gave it gas it just stopped. Had to choke it to get it restarted.
Second time was after coming up a hill for about a quarter mile I rolled up to a stop light and let off the gas and then back on as the light turned green and it died again.
Did the same thing one more time as I cruised through my neighborhood. I would let off the gas as I went through an intersection and then when I throttled back up it died.
It was about 90 degrees out so it was hot. It ran fine in the cool morning on the way to work.
I pulled the plug today and after less than 100 miles on it it has some carbon build up on it. Half of it is pretty white and half of it has black on it.
Driving symptoms seem to be pointing to rich running. Just haven't had time to open the carb up yet and see what I've got. Going to have to stop driving it until I get it fixed. Unsafe to have it die when I'm going through an intersection.
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;D Proud of myself for thinking of a test since the plug color/condition and riding results are giving mixed messages.
I covered about 20% of the intake snorkel with electrical tape. I figured if the scoot was running lean, this would help it run a little better and if the scooter was running rich, this would make it run a lot worse.
It ran quite a bit better. Picked up a couple of mile per hour even coming up small hills. Did some long full throttle slightly uphill runs to make sure it was good an hot and it ran strong.
So that means it is running lean and maybe just cleaning the carb will fix it. At worst, I'll have to buy a larger jet.
Was only hitting about 42 mph on the flat. WIth the tape on I was hitting 50 on a very slight downhill and 42 on a slight uphill. THink I'll like the speed once it's jetted properly.
Then I can add a pipe and upgrade the variator. 8)
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Good trouble shoot test for carb jetting. Yes, once you get it running right should be a very nice ride. Cheers
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I checked the plug again and it looks a little rich definitely not lean. I turned the low speed air screw one quarter turn more rich and now everything seems very good.
I pulled the variator off and replaced the stock 8.5 gram roller with 6 gram rollers and now it accelerates better out of intersections and slow speed corners and goes up the hills around my house anywhere from 2 to 5 mph faster.
I'm liking the scoot. This fall I can budget for a better exhaust and then I'll be super liking it. Right now around town I regularly am riding at 42 -45 mph on the speedo, about 35-40 actual. That's exactly what I need.
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The attached photo is the jet the 2T People carb needs. Many places sell them, including the jetsrus business in the watermark, just make sure you get the correct dimensions.
Do you know which needle (slow jet) the People 50 uses?
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Hello mclark, needle is not slow jet, and generally is not adjustable. wordslinger has a thread how he adjusted his, so possible. There may be needles available for the carb, but I don't know which one, or if it would work. I plan to measure mine at some point and search for equivalent size that has adjustment grooves. I think OEM carb needle for our Keihin carbs is designed to be nonadjustable.
I order from jetsrus, slow jet is N424-74C. I had a problem with equivalent OEM slow jet, so I recommend spending the extra $'s for Genuine Keihin slow jets. The equvalent OEM main jets seem to work well, so I save a few $'s there.
Here is link to slow jet https://www.jetsrus.com/a_jets_by_carburetor_type/jets_keihin_N424-74C_slow_27-xxx.htm (https://www.jetsrus.com/a_jets_by_carburetor_type/jets_keihin_N424-74C_slow_27-xxx.htm)
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Hello mclark, needle is not slow jet, and generally is not adjustable. wordslinger has a thread how he adjusted his, so possible. There may be needles available for the carb, but I don't know which one, or if it would work. I plan to measure mine at some point and search for equivalent size that has adjustment grooves. I think OEM carb needle for our Keihin carbs is designed to be nonadjustable.
I order from jetsrus, slow jet is N424-74C. I had a problem with equivalent OEM slow jet, so I recommend spending the extra $'s for Genuine Keihin slow jets. The equvalent OEM main jets seem to work well, so I save a few $'s there.
Here is link to slow jet https://www.jetsrus.com/a_jets_by_carburetor_type/jets_keihin_N424-74C_slow_27-xxx.htm (https://www.jetsrus.com/a_jets_by_carburetor_type/jets_keihin_N424-74C_slow_27-xxx.htm)
Thanks - That's what I'll order when I order the new exhaust.