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Post by prodigit on Jul 26, 2013 18:49:19 GMT -5
Think about owning a car for 10+ years.
That means if you can buy a $1500 scooter every year, you'll still be cheaper than a car.
What better than buying a $1000-1200 scooter every 2 to 3 years (because that's their avg lifetime imho)?
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Post by prodigit on Jul 26, 2013 18:46:17 GMT -5
ride on nitro?  |
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Post by prodigit on Jul 26, 2013 3:36:53 GMT -5
So far I'm surprised to find at 5k KM I haven't done a valve adjustment yet.
I do know that sometimes carbon deposit on the valves causes the valves to be pressed more open and causes more wear on the adjustment screws (as the tolerance will be lowered due to carbon deposit on the valve edges); so I made it a custom to put a bit of seafoam in the tank every oil change (every 1000km).
My ATM has been a true workhorse. I might want to save up for a better bike soon though, probably a ninja 300. Not into too heavy sports bikes, but I think I want to go the way of the ninja. They're all geared too short (for sports instead of cruising), and I like the looks of a ninja, but I prefer to cruise around rather than race. The Ninja has quite a large rear sprocket, that can be changed with a much smaller one.
Might be an excellent replacement for my stock Chinese bikes.
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Post by prodigit on Jul 25, 2013 21:55:38 GMT -5
Isn't aviation gas only red colored kerosine?
I believe they use it in tractors and military vehicles too.
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Post by prodigit on Jul 25, 2013 21:54:36 GMT -5
the more freeflow the exhaust is, the more fresh air/fuel ratio goes into the bike.
Notice that no one really restricts exhaust?
Unless if it's done with purposes of degrading performance.
Mainly air intake is restricted, to reach upto EPA norms. By restricting air intake, they can create a 50cc engine, with fuel economy and EPA ratings of a lower cc engine; but it's also performing as a lower cc engine, restricting speed somewhat, which one could also get by restricting exhaust, which is only done for one reason, to lower sound emissions).
The only reason I can find when using a free flow exhaust, is when the engine is already running lean, the ratio may be even more off when it's free flow. But normally, when the ratio's are correct, when using a freeflow exhaust, compared to a more restrictive stock exhaust, the A/F ratio's in the carburetor should still be the same.
The freeflow exhaust allows less combusted gasses to remain in the cylinder, and more fresh fuel mixture to enter the cylinder.
So, yes, in some sense I think you're right, when the remaining gasses in the cylinder (mainly CO) mix with the fresh mixture, more carbon will mix with oxygen, and make the mixture run richer, as there's less available O2 in the cylinder, and the remaining CO exhaust gasses in the cylinder will compensate for a too lean running bike.
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Post by prodigit on Jul 25, 2013 17:57:05 GMT -5
FYI, I think scootnwinn is either jealous, or he's just a crappy modder! I mean, if he was even paying attention he would know that I'm not the only one who gets these speeds out of a stock taotao. Then I laugh when they buy expensive performance mods, and do all kind of shizz that makes their scoot slower than my stock one! I laugh at your futile efforts to beat the BP fuel!  |
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Post by prodigit on Jul 25, 2013 16:49:00 GMT -5
My ATM is about to retire. No valve adjustment and still going strong almost 5k kms!
So far, the kick starter is corroded, needs lubrication, the rear tire is leaking, and the blinkers stopped working.
But that's about it!
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Post by prodigit on Jul 25, 2013 16:45:33 GMT -5
Sorry, yes,  I meant to say 3x 3/8" I first started with 1/8", but 3/8" sounds better. I put 4 holes, but I think it's a bit too much. Besides, the bottom hole is prone to rain entering the muffler, so it's better to just drill 3, one on top, and 2 to the sides, and forget about drilling a hole under the exhaust tip. The extra holes make it sound a bit more gritty, also at idle it very much resembles the sound of a stock 150cc scoot. |
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Tablet
by: prodigit - Jul 25, 2013 11:16:36 GMT -5
Post by prodigit on Jul 25, 2013 11:16:36 GMT -5
there are many possibilities.
You can stick with the known brands, or gamble upon unknown brands.
you can prefer larger or smaller than the stock 7" screens you get for that price.
Know if you go larger (eg:9"), there must be some kind of downfall on that tablet, like not capacitive touchscreen, or low battery life or something.
Look at them all, compare specs.
For me, internal memory (ram and rom size), modern OS (Andr. 4.1 instead of 2.3), long battery life, and good graphics are important.
Other people might put more value on size, looks, shape, accessories...
it really depends on what you need!
I bought myself a new android phone. An LG Optimus L9. It's based on only 2 cores instead of 4 or 5. It's cheap, long battery life, good contrast, fluid screen, and I think it's worth every penny I paid so far!
that, and I pay $45/MONTH for phone + 3G internet unlimited!
It's way better than $30/month for phone, and $40/month for internet.
I'm not a downloader, but if I ever need something I can always use wifi.
The 3/4G connection works fast, and can help me out in a pinch (should I need to know where I am it has a GPS inside as well).
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Post by prodigit on Jul 25, 2013 10:58:48 GMT -5
Today I drilled out the stock muffler on my ATM50, and was going 50MPH on it, about a 2MPH higher top end than stock.
Acceleration was lower, but top speed increased.
Also idle RPM went up, and idle exhaust gasses don't smell like gasoline anymore;
I drilled 3 (edit:)3/48" holes in the stock muffler right next to the exhaust tip (one on the top, one on the right, and one on the left).
The idle sound sounds a bit heavier, and while riding the exhaust gasses can be heard a bit better, but it's still pretty much silent.
The only theory behind drilling out the stock exhaust tip, is that the tip is often so small, and the exhaust thuds cause the exhaust gasses to go very fast at the tip, causing unwanted back pressure.
The 50cc is pretty ok, but my EVO150 has a smaller exhaust tip than my 127cc, and it's only a tiny bit larger diameter than on my 50cc!
By drilling holes next to the exhaust tip, the gasses will exit the muffler chamber easier. The noise increases but only slightly, mostly only noticeable in idle.
By reducing back pressure, less gasses will try to go back into the exhaust pipe towards the valves, supposedly creating a more efficient engine, but slightly more loud scoot.
I personally think for the ATM50 that the modified stock muffler is good enough for exhaust gasses to exit at a reasonable speed, instead of investing in a performance exhaust where the tip is so wide that the muffling effect is almost gone, and you'd be investing $100 to 'perhaps' go 1MPH faster???
While drilling 3 holes in an exhaust costs almost nothing.
I'm still running tests, but so far I'd have to say that on the ATM-50 the mods are pretty useless to do.
I have the impression that acceleration is lower, but top speed is higher.
I will probably do the same on my EVO150 soon, after I see some more MPG numbers.
Just test riding the ATM for now.
When changing the exhaust to a performance, or drilling it out, there's no need to re-jet, as you're not changing the AF ratio.
Only when changing the air intake (like removing restrictions) do you need to rejet.
If the bike is running fine, and you're just putting a larger airfilter but there's no real huge difference between both airfilters, you could always adjust with the AF screw, and rejetting might be entirely unnecessary.
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Post by prodigit on Jul 25, 2013 10:43:46 GMT -5
I usually mean top speed after riding for a few tens of minutes. I also fuel with BP Premium, which I already told, is 10% better than any other fuel out there, imho.
But most people who bought the ATM50 have similar speeds than mine, perhaps 1 or 2 MPH slower.
And most who bought the EVO150 also have similar speeds, perhaps 5MPH slower, which I also entirely attest to the type of gasoline I'm using.
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Post by prodigit on Jul 25, 2013 7:15:23 GMT -5
A 125 should be able to get you to almost 60MPH manual gears, and 50-55MPH with CVT.
Sounds a bit on the low side. My ATM50 does 48MPH on a good day, 43 on a bad one.
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Post by prodigit on Jul 24, 2013 15:26:06 GMT -5
I don't know if Imageshack.us does GIF.
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Post by prodigit on Jul 24, 2013 14:07:45 GMT -5
+1 on the valves.
I've been running mine now ~5000km, and around ~3500km I hear belt chirping. In the beginning it was only when I would go over 40MPH to 45MPH. But now it's even there when I surpass 35MPH.
I thought it was from the belt, but the belt looks as good as new, with no noticeable dust in the CVT. Also the noise seems to come from the rear right of the cvt.
I don't notice a performance loss, and aside from this issue only had my blinkers and horn stop working after a heavy downpour.
For the rest, the ATM is a true workhorse.
Try also putting it on the center stand and see if it revs higher.
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Post by prodigit on Jul 24, 2013 8:16:20 GMT -5
You can't really go by color.
If your idle jet is rich, and your main jet is correct, the plug will look black, eventhough you're having the right color. Mine for instance is grey. Black and white, because it runs lean @wot, and rich @ idle. Haven't had any problems with it though...
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