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People 250 / Carburetor kymco 250 people s and high speed problem, black spark
« on: May 02, 2017, 07:17:02 PM »
Hello
I am almost 50, do live in Switzerland and I just purchased a kymco people s250 in blue with about 6'000 miles. I am very happy with this scooter.
I changed the spark, the engine oil, the transmission oil. But I am a office clerk "without" mechanical know-how.
The air filter was totaly dirty with black dust: but I had not a new air filter, so I cleaned the air filter with pressured-air. It is now "cleaned" and quite OK.
My problem: the kymco runs still only up to 90 km/h quit normal, but then it takes a long time to get up to 110 km/h. And 110 km/h is the high speed... but it should be 130 km/h on the speedometer. (I have an older foresight 250: an the foresight runs much more faster after 100 km/h).
After my cleaning und maintenance and changing oil, the kymco was only a little bit faster, but still too slow after 90 km/h.
(sorry for my english, I try my best....)
The old spark (which I replaced) was black on the top. So I think, that there is too much fuel?
So I have two questions:
What can be the reason for the insufficient top speed?
Can it be the carburetor? How do I adjust more air oder less fuel? I know the idle screw, but where ist the screw to adjust the air-fuel mixture? In which direction I do have to turn the screw?? Does any one have a picture of this screw?
Is there another possible reason for the low top speed?
Maybe I have to adjust the valves?
Or can it be the choke (not dismissing 100%?) ?
I am glad about every tipp and hint! And I hope, that I will found some help in this huge forum. Thanks a lot!
Wish you a warm spring time an hot summer
Yours, from Switzerland
Edi
I am almost 50, do live in Switzerland and I just purchased a kymco people s250 in blue with about 6'000 miles. I am very happy with this scooter.
I changed the spark, the engine oil, the transmission oil. But I am a office clerk "without" mechanical know-how.
The air filter was totaly dirty with black dust: but I had not a new air filter, so I cleaned the air filter with pressured-air. It is now "cleaned" and quite OK.
My problem: the kymco runs still only up to 90 km/h quit normal, but then it takes a long time to get up to 110 km/h. And 110 km/h is the high speed... but it should be 130 km/h on the speedometer. (I have an older foresight 250: an the foresight runs much more faster after 100 km/h).
After my cleaning und maintenance and changing oil, the kymco was only a little bit faster, but still too slow after 90 km/h.
(sorry for my english, I try my best....)
The old spark (which I replaced) was black on the top. So I think, that there is too much fuel?
So I have two questions:
What can be the reason for the insufficient top speed?
Can it be the carburetor? How do I adjust more air oder less fuel? I know the idle screw, but where ist the screw to adjust the air-fuel mixture? In which direction I do have to turn the screw?? Does any one have a picture of this screw?
Is there another possible reason for the low top speed?
Maybe I have to adjust the valves?
Or can it be the choke (not dismissing 100%?) ?
I am glad about every tipp and hint! And I hope, that I will found some help in this huge forum. Thanks a lot!
Wish you a warm spring time an hot summer
Yours, from Switzerland
Edi