KymcoForum.com
Scooters - 50cc => Agility 50 => Topic started by: wordslinger on September 11, 2009, 03:47:22 PM
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..it's been about 10 F degrees cooler around here for the last cpl days..
..seems I'm seeing a 1-2% increase in overall performance...
..quicker take-off..stronger on the flats and less drop-off up the hills...
..hmmm...........
:o
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Every bike or car I have had performed better when it is cold.
The only difference is People 250 S. It runs much better when it is warm outside - 30-35 C is ideal!
This all depends on rejetting. When I had Kawasaki ZR-7S (750 cc), I had it rejetted with different main and pilot jets, another exhaust, K&N etc... there was a dedicated Web forum to this bike and we all used the same parts, yet the end result on dyno test was different in various parts of the world. It was the best on sea level and the worst for those who lived at higher altitude.
This is also the reason why some bikes work very smoothly when it is warm and have problems working when it is cold outside (and when they are just started). For example, my ex. Beverly 200 worked very smoothly when it was very cold, -10 - 0 C.
Bikes should be rejetted for different temperatures and altitudes, of course, nobody does that as it is too complicated, so I guess that factory setup is a compromise that should work under all conditions.
Kymcos are produced in China and you should check where exactly the factory is and where they are assembled and tested and probably they will work best under similar conditions. If you take them to 4000 m altitude or to very dry and hot climate, you will experience problems...
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Colder air is denser, there fore more air in the cyl. you may benifit from the new filter more than you expected.
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..wow, yeah, well now I'm getting excited...
..imma log outta here, head home and get to tuning!!!
..Updates 2moro!!
peace
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Colder air is denser, there fore more air in the cyl. you may benifit from the new filter more than you expected.
The engine will benefit from more (cold) air only if the mixture in the carb is already a bit too rich, otherwise not.
Most of these things reflects primarily on carburetor engines, not injection that should be pretty much in balance all the time...
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I notice better performance in both my scooter and car when its cooler out..and my car is fuel injected.
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Kymcos are not chinese...Try Tiawan brother. way better.
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Kymcos are not chinese...Try Tiawan brother. way better.
Nobody said "Kymco is Chinese".
I said "Kymcos are produced in China".
There is a big difference.
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The engine will benefit from more (cold) air only if the mixture in the carb is already a bit too rich, otherwise not.
Most of these things reflects primarily on carburetor engines, not injection that should be pretty much in balance all the time...
..I found that to be absolutely true...as I was tuning my carb after installing that air filter...I determined that I was running a RICH fuel mixture...
..however, late in the evening..when it was much cooler, my scoot almost ran fine at WOT...that was the key point that led my in the right direction...
..thanx axy!!