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Post by prodigit on Jun 9, 2013 23:47:38 GMT -5
well, with it I mean to say, it's better to have vapor and air, than just air. The vapor helps combustion. if the vapor was thicker (more fuel per air), it would be better, but the fuel tank vapor is so light, it basically is almost the same as regular air.
What I was trying to say is in vapor there are droplets the size of molecules. With droplets there's droplets. It's always better to have a fine mist of fuel in the air, than having larger droplets.
IMHO, you can just plug that thing! at least it won't let you waste gasoline that way.
The hose gets enough from the tank, besides, the vacuum line is also connected to the gearbox, with a larger tube, so you won't cause any vacuum problems plugging it. It might even be better, not to have airflow going through it.
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Post by prodigit on Jun 9, 2013 23:43:11 GMT -5
Re-gap the spark plug (make the arm come a little closer to the center pin)
Also fuel BP Premium fuel.
Pump up the tires to at least 35PSI, 38PSI is best!
Remove the trunk.
Changing the rollers to lighter ones is good advise. Changing it to sliders is even better advise.
Other than that, there's nothing really to de-restrict. You could put a 150cc performance exhaust muffler on there, but then you'll need to rejet.
Other than that, BBK is the way to go.
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Post by prodigit on Jun 9, 2013 23:38:50 GMT -5
Well, of course, all scootards that post 100 posts, get a real chrome painted scooter - wheel - tire - valve - cap - sticker! I don't know what I'd do without one!
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Post by prodigit on Jun 9, 2013 22:29:52 GMT -5
That's actually the overflow vacuum line.
Gasoline would flow out, when you overfill the tank. When you overfill the tank, also the bike will suck in liquid gasoline, and inject that in the air intake, which will make it burp (rich), or shut down.
It's actually meant to suck gasoline vapors via the vacuum lines straight into the carburetor, to have a better air fuel mixture, as the vapor enriches the mixture, and vapor is better than fuel sprayed in the air (drops).
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Post by prodigit on Jun 9, 2013 20:34:29 GMT -5
I also used corrosion x on my scooter, however I seem to need to treat it just about every 3-4 months when there's a lot of rain, or rust still spreads. |
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Post by prodigit on Jun 9, 2013 19:45:16 GMT -5
My stock TaoTao ATM50 does 40MPH, but when fueling with BP Premium fuel (over here in USA), it goes a lot faster. When the engine is heated up, and the roads are level, it goes upto 48MPH, 53 with some wind in the back. If you're living in a hilly area, the BBK is going to give you better climbing ability. It does very little on top speed, unless you also change the gearing. Are you sure about the top speed not being affected by a BBK. I put bbk's into 2 different scooters that I already de-restricted. A 47mm bbk added about 10 more mph with the increased torque and hp. I don't know. All I know is I have it stock from the factory. If it is the famous 63cc, then I'd say 100 true cc's is about what you need to get around fine on a scoot, and speeds high enough to go anywhere but the highways, or interstates, though as long as you can maintain 50MPH (40-45MPH on highways), you're allowed on them. |
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Post by prodigit on Jun 9, 2013 19:14:09 GMT -5
I'm not alone. You should see alleyoop, or some of the other mods  Still I don't make it in the top 5!  Ever my wife's breakup, I have nothing else to look forward to, than my scoot, my 127cc motorcycle, and perhaps this forum. I'm glad it's here, being a distraction to me. |
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Post by prodigit on Jun 9, 2013 19:12:57 GMT -5
There are not that many chinese scoots that come stock with high compression engines.
It's rare to even find Korean models, unless they have fuel injection, but even then...
High octane is not helping early detonation due to an advanced timing on the CDI, but predetonation (or detonation of the fuel before the spark plug fires), which could both be caused by high heat, or high compression (as under high heat fuel ignites faster, and air is under a higher pressure).
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Post by prodigit on Jun 9, 2013 18:13:51 GMT -5
Ok, with the choke I can kind of get the fuel mixture working at peak all the time. If I could upjet the main jet, I'd go even faster, but just riding with the choke on at 1/4th, it accelerates pretty fast, and reaches top speed pretty fast. I confirmed, when I was going up a bridge, I went at 59MPH, and went downhill at 62-63MPH (on the speedo). This lead me to believe that the bike is rev-limited, (as the speed difference between up and downhill was so small) and has much needed power spare that can be converted to more top speed. The engine is running at the top of it's revs, but if you're not too heavy, you can at least go 3 tooth down on the rear sprocket, or 1 up at the front. I'm probably going to do both; increase the front sprocket from odd 15T to even 16T, and the rear sprocket from even 40T down to odd 37T. That would be a change of 5.5T, or 13%; hopefully results in 13% higher top speed (~68MPH on the speedo), and since most riding is done in the final gear, it should bring MPG up by 10%, roughly estimated brings it in the  's of MPG. The bike feels most comfortable ~30MPH, with sprocket change I expect it to be ~35MPH. If I can not change the front sprocket, I'll change the rear to 36T, which is only 10% difference from stock. Since first gear is jerky, and very fast (I can accelerate too fast in first gear, and hit the car in front of me if I'm not slowing down a bit), a sprocket change would make not only higher top speed, but would slow down first gear acceleration, while allowing me to stay in gears longer. This is good, because after the first 20MPH, I've already shifted to 4th gear (or 3 shifts). A 10-13% change will not mean a lot, but it's something. That way I can hit 2 birds with one stone! So currently |
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Post by prodigit on Jun 9, 2013 18:03:22 GMT -5
My stock TaoTao ATM50 does 40MPH, but when fueling with BP Premium fuel (over here in USA), it goes a lot faster. When the engine is heated up, and the roads are level, it goes upto 48MPH, 53 with some wind in the back.
If you're living in a hilly area, the BBK is going to give you better climbing ability. It does very little on top speed, unless you also change the gearing.
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Post by prodigit on Jun 9, 2013 4:52:19 GMT -5
LOL!
Looks like it goes almost 50MPH!
Also looks like the pedals hit the street quite easily (with the least of a corner)!
And I suspect it's a hard tail, so no offroad racing with it.
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Post by prodigit on Jun 9, 2013 3:01:04 GMT -5
Could be a variety of things,
1- Bad weather, too much humidity in the air will reduce performance, low pressure will make you run richer.
2- Wind against. Sometimes the wind goes against you on a certain road. Not enough to notice, but if you have a 5-10MPH wind against you, while on another day it's in your back, you could easily see a 5MPH speed difference.
3- A high pressure (sunny) will make you run leaner, but also will make your tires deflate somewhat (pressure can drop by a few PSI). Deflated tires cause drag, that can be translated to slower top speed and acceleration.
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Post by prodigit on Jun 9, 2013 2:57:51 GMT -5
Or scootard?  |
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Post by prodigit on Jun 9, 2013 2:49:00 GMT -5
It goes well, so far it has an estimated 140 km on about 1 gal of fuel, very roughly estimated ~85MPG. I have worked on it, so it wasn't using fuel only to ride. A lot of the fuel was during startups, idle running etc. while I was working on it..
My only gripe was about 140km, with still 20% of fuel the thing just cut out. Turns out there's not enough fuel supply without a pump, when the tank is getting empty.
On the fuel gauge the LEDS stay green (100%) to about where there's 75% of fuel left in the tank. Then rapidly they diminish to 25% (which happen to also correspond with ~25% of fuel left in the tank), where the bike died.
I do enjoy riding it, with some mods to it.
However the ratio of wrenching/riding is too high.
This bike takes about 5-10x more wrenching than my EVO150, which takes about 3x more wrenching than my ATM50.
The good about the bike is that I can use the choke to optimize the AF ratio while riding. In S-florida we don't really need the choke, as it starts up fine without. I'm keeping it fixed at 1/4, perhaps on a cold morning I need to open it up a bit more to 1/2 for the first 10 seconds or so.
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Post by prodigit on Jun 9, 2013 2:39:05 GMT -5
Alright guys, Got some bad news for those who want to buy this bike for nice riding around town. First of all I need to upjet the darn thing; it runs too lean, and constantly need to ride with choke 1/4th opened. Second, I haven't yet done my full inspection, but the rear wheel axle nut came loose while riding. Now I have mounted it with a pneumatic hammer, so it was super tight! That's why the chain was loose, and I heard some cracking (chain rubbing against rubber). Third, almost all bolts are starting to corrode after riding only 2 small trips in the rain! 4: The front fairing (plastic plates in the front) start to vibrate a lot and make noise; almost like my BMS, who after 2000 miles was rattling apart! True, I put heavier oil in, so this coming oil change I will put lighter, 5W30 oil in, and see if engine vibration gets reduced. Since I haven't done the oil change yet, I can't tell how it looks like, but the first oil change MUST be done before 50km's! The oil was pretty metallic, and black. On the bottom, there are 2 oil drains. You need to use the bigger one, which is on the right side, near the foot brake pedal. Don't use the left one, because there's a rod in there, tightened with a large spring. And when opening the small one, and the spring jumps out, trying to get that spring back in sucks! 5: The clip holding the gearshift pedal got lost, causing the gear pedal to slide off the motorcycle! Very dangerous, and very weak manufacturing! I had to temporarily fix the issue with a plastic zip tie, until I find a more permanent solution.  (sorry, Imageshack rotated the image) 6: The stock spark plug is wearing faster than any chinese spark plug I've seen before. At 150 km, it was already worn in, so I suspect to be able to get 1000-2000 miles out of it. I changed it to an irridium spark plug now. I wrote Rebelgears to see if they can make me a front sprocket. If so, the front sprocket will be the first mod I will do to this bike! |
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's of MPG.