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Technical | How To / Re: How to handle the Kymco 500 scooter?
« on: April 14, 2018, 10:08:57 AM »
GT300i. The same.
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The advantage with the twins is that it's easier to get the smaller components to produce a higher rpm. In the case of the Yamaha twin, it's at 8000 instead of 6500 for the People 250.
There's the Suzuki GZ250, a single cylinder, two valve, air cooled engine that puts out about 1 hp more than the People 250. Apparently still at 8000.
Even if you divide the HP by the number of revolutions, then it's about 20% less for the Suzuki single and 5% less for the Yamaha twin compared with the People 250.
Evidently the sports bikes have an even higher maximum engine speed as well -- mystery solved I guess.
Since my engine blew, with the most likely culprit having something to do with the cooling system, I've come to view air cooling as an asset. One member here said that the small coolant passages trap air easily, even after bleeding, which is my best guess as to what happened. And it went from supposedly normal operating temperature to critically overheated very quickly.
Are oil cooled bikes more similar to air or water in terms of tight clearances and narrow operating temperatures? Somewhere in between?
With regards to water cooling increasing power -- not always? My water cooled People 250 produced I think 19hp. Air cooled cruisers (Yamaha, Suzuki) will produce more. Kymco's water cooled cruiser and Hyosung's oil cooled cruisers produce more than the air cooled, but not 40% more. For some reason, the sport bikes will be even more than that -- oil or water.
Yikes I’m old.
Time was “air cooled†and “vw†were one in the same !
AMAC
Respectfully
Agreed - H2O =
+ HP - ✔
+ MPH - ✔
Longer engine life?? ..287,000 miles on my a/c VW (then traded for the new Rabbit)
My new a/c Piaggio meets the '18 Euro regs.
H2O = "meh"...for a % of us a/c riders/drivers.
Stig
Nor can I see a 49 cc Scooter surviving any length of time operated under those conditions.
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One pf the many reasons I like aircooled scooters (and cars, when I could buy them) is that I have no worries about the cold winters here in the Midwest, or back in NewEngland.
Nor do I have any worries about leaking fittings, failed pumps, holed radiators, cracked hoses, faulty thermostats, boiling over, etc., with an aircooled scooter.
Can we get a night shot of the instrument cluster, to see what you're talking about?
Yeah, big wheel scoots lose in the under seat area...but you know that.