New Grubee Skyhawk can't get high rpms or go uphill. Bogs down.

I just finished putting my bike together about a week ago. I started breaking it in with 24:1 and the stock spark plug/wire. Its cold here in NJ, but I can get it running pretty quickly.
The problem is with the clutch in, I can barely get it past half throttle without the engine bogging down. With the wheel engaged I'm lucky to get 1/4 throttle going down a slight hill. Going up a very very slight hill the motor bogs down completely and I'm forced to pull the clutch in.
One thing I find very strange is if I go down a big hill with the clutch out, it still only lets me throttle about 1/4-1/2 way. Even with the motor slowing the bike down, I can't give it enough gas to make the wheel spin.
My first thought was I just need to break it in for a while, but after 50+ laps going up and down my street with no change at all, I decided to replace the spark plug, boot, and spark plug wire. Just put those in today and still no change. (plug gapped at about 0.025)
If I'm patient I can kind of lure the bike into high rpms with the clutch in for a second or two with careful feathering of the throttle, but not consistently.
I'm open to all ideas.
Is it possible the bike still just needs to be broken in more? I've used probably 1/4 a gallon of gas so far.
I could also take a video if anyone would like to see whats happening.

Hey, thank you very much for the responses. I'm still trying to diagnose the problem but have been busy.
I checked the exhaust pipe and it flows freely.
I tried spraying WD-40 where the carb meets the intake while it was idling and it did seem to die, but not after just a sprits, more of a solid spray. And its possible the engine died on its own. I'm going to do the same test later but with starter fluid instead(don't have any right now). It should be easier to tell if the engine is reving than if it dies down.
The way this carb meets the intake I originally thought there was a giant leak because theres a plastic sleeve that doesn't go all the way around the intake pipe. I took it off and messed with it and tried to clamp the carb down tighter, but then realized thats not what makes the seal anyway. I think the intake is supposed to sit all the way against some rubber in the carburetor, which is weird because theres nothing to tighten or anything to improve the seal other than pushing the carb on very hard before securing it in place. I'm not sure if filling it with silicone stuff would do anything.
I'll post more updates as they come.

Venice Motor Bikes said:

Try a NT carb... you can buy one for $20. They are very user friendly!

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Alright.. Where is a good place to order one of those? After I try plugging it up with some sealant I'm ready to give up on this carb.

Either this is a horribly flawed design or I'm doing something wrong.
When I took it off this time there was some exhaust sludge around the white plastic bushing. So I'm positive air can get in here.

Heres are pics of what the inside looks like. The intake pipe sits in here with that plastic bushing (that blatantly is not to keep gas in/air out, its just there to hold the carb to the pipe) and presses up against the back piece of rubber. Its hard to tell in the pictures but when the pipe is up against the back rubber, the outer rubber piece sits around the outside of the pipe. but just barely.




and this next pic is shining a flashlight into the carb, so you can see that theres only roughly one centimeter of rubber between the end of the pipe and the outside world, with nothing actually clamping it down.
This design is blowing my mind...




Sorry for all the super close up blurry pics but i'm really trying to get the message across.
Does anyone agree with me that this is a really BAD design?
Or is it possible that I don't actually understand how it works?


If I try to seal this up with gas resistant RTV should I spread it everywhere inside and out with the pieces off, then put them together? Or should I put everything on tight and then try to seal it from the outside. I'm really worried about getting the stuff inside the carb if I were to put it where it really needs to be (all in/around the rubber part)

EDIT: Heres a video too, lol.
http://www.youtube.com/watch?v=JcgOl3-gius

cory151 said:

Let us know when your NT is installed, are you running a 66cc or a 49cc? If it is a 66cc you likely want to bumb the jet one groove richer after reading the plugs. I know I did and it runs perfect now. Good luck.

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Cool thanks. I've got a 66cc. I ordered an NT from spooky on Friday so it should be here soon.

Woo hoo!
My NT came today. I slapped it on and it ran like a charm!
I did have a little trouble up a steep hill but compared to the CNS its spectacular.
I'm going to play with it more tomorrow and check the plug color. I bet I can make some adjustments and get more power out of it. But as of right now I've got zero complaints.