Motor has no power.

Ok here's the deal.. I bought a new "80 cc" kit and put it on my bike with few hiccups. I mix it 16:1 (as recommended by the manual for break-in period) and take off on the bike to fire it for the first time. After some adjustment, it idled very nicely. So after letting it warm up, I decided to go for a spin. It takes off ok, but then it's like it hits a brick wall. It will not accelerate any faster and is only doing around 12-15 mph, and with a 41T sprocket, I assume it should do considerably better than that. It has ok low end torque, little mid-range, and no top end whatsoever. As a matter of fact, I can't really get it to rev up at all. It just get's to a certain rpm and it's like it's being choked off or something, although, it seems to me that the exact opposite is happening, as it's more of a... Wet, heavy bog than a dry, panting type. I'd like to point out that it sprays some unburned fuel/oil out of the exhaust, which to me indicates that it's actually getting too much fuel. Could I be wrong..? And if not, then what do I do about it?

16:1 is too much oil!!! Use 24:1 for the first two gallons.
16:1 was back in the old days when they used to mix regular motor oil with the gas.
Also, make sure your choke lever is down.

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Maybe.. But even at that, it should still rev up at least, albeit smoking like a freight train in the rockies...

Edit: I think I have officially ruled that it's getting too much fuel. The plug is wet-looking (after being ran for a couple miles) AND it's almost black, which I s'pose could be the heavy oil mixture, but that don't explain the wet. Moreover, now that I think about it, I had a moped that had an air/fuel mixture screw on the outside of it's carb and if you loosened it and allowed more fuel to go through (which i thought would make it faster at the time... young, silly me), it started running in a very similar manner. Dogging around, much less power, etc. And when tightened back, it began to run well again. Now the big question: What do I do about it? New carb maybe? I hate that because it's a BRAND NEW kit...

Too much oil can foul the plug & make it wet & black!! (& cause poor performance.)
Try re-mixing the fuel first, before messing with the carb!

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For engine kits & bike service in Los Angeles, visit us at- www.VeniceMotorBikes.com

Then let me drain the tank and mix a fresh batch and I'll come back with the results. Should only take a few minutes..

Make sure the choke lever is down when you ride!

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For engine kits & bike service in Los Angeles, visit us at- www.VeniceMotorBikes.com

24:1 fuel mixed in. Still not running right and for some reason, the slide is sticking at WOT.... I think I'm just gonna get a new carby...

I am in the middle of getting mine to run correctly, also. It is a new build, my first (a Black Stallion 66cc.) which looks great but has not been w/o problems. First the killswitch was faulty and prohibiting any chance of it starting (no spark), so I have removed the ground wire temporarily so I could get it running. Then, running, it would perform EXACTLY as you described. I am running a 16:1 ratio, also, and was scolded by my two-stroke guru buddy who said maybe I should siphon maybe a cup out of my tank and pour in some gas to even it out to closer to 18:1. I still have not done that as I found that, by taking off my float bowl, the little brass piece in there that looks like a pipe, was slightly clogged. Oh, hehe and it came from the factory that way AND was not even screwed in at all. It was laying horizontally on my float, AND my little white plastic donut float was 3/4 full of fuel???? Rule #1, if you buy something inexpensively, it doesn't mean it is going to be junk, it just means that it was produced inexpensively by cutting corners on material quality or cost of labor or just in not fully inspecting it before shipping. However, I have to say that the kit was complete, well designed, simple and included all the needed parts to make it fit nearly any oddball frame shape. It did not take me 3 hours as stated. More like 7 combined, and I still can't ride the darn thing. The guys at Kings were quick, courteous and immediately arranged that I will be getting a new float in the mail. I called on Tuesday at closing, so I figured they would process my request Wednesday and maybe mail it that day or Thursday. It is now Friday and the mailman has yet to arrive, so I am crossing my fingers that it will be in the mail today. It will take me 5 minutes to put it in the float bowl, screw two screws back in place, remount the carburetor on the silly little intake tube, pop my gas line back on and fire it up. I hope that works. Funny thing is while it ran like crap with a bad float and that brass piece not even screwed in, it still ran and actually pulled me up a pretty big hill. I am 210 pounds. I am not expecting a rocket, but if that is what it could do running poorly, I am certain to be pleased when broken in, dialed in, etc. Oh, btw, this is my first bike, a Schwinn Beach Cruiser. I have had it ten years for $199. The motor was about $175 including shipping to MO and then had my mother-in-law ship it to me in CA, where they can not sell them to CA residents. There are ways around that BS. I can hear about 50 different two-stroke weed-eaters, leaf-blowers and chain saws daily around here. Is it because mine has wheels and can potentially provide me with affordable transportation with a carbon footprint that is probably 1/5 of my 20mpg 4 cylinder Toyota?

If the slider in the carb is sticking?, don't screw the top of the carb on too tight.. this should solve that problem.

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For engine kits & bike service in Los Angeles, visit us at- www.VeniceMotorBikes.com

I have this problem, too. Are you meaning the throttle cable that goes through the little aluminum threaded cap when you refer to screwing the top on the carburetor?