Dong Fang DF 250 RTB Bobber Information

[axa]

After only 20 miles of trouble free riding the first day, I have now noticed on only my second day riding, after only about 10 more miles that I suspiciously have the same problem of the engine just dying on me.
First time it happened, first trip on the highway doing no more than 45 (50 indicated) it started to backfire and losing power around the same time. Then as I pulled off slowing down it happed, a stall as soon as I stopped giving much throttle.

Sat a few minutes because just at that time I noticed the tube just out of the secondary intake port near the head had burst. So I trimmed it back and reattached... so after a 20-25 min rest I was on my way home. But 5 min later just seconds from home, the same thing backfire/spudder and stall when rolling in my driveway.

Sat again, this time olny 5-10 min, took it for a test ride across in a parking lot across the street, and in 5 min same shit again.

The first days ride seemed to go without a hitch, 20 min each way to work and back. Only difference might have been i was real soft on the throttle, and there was no initial indications of a problem ...

I don't like where this pandemic seems to be going.

Hey guys, I posted a while back. Got my bike and I love it... but can't seem to get the dang thing running right.

Here are the symptoms:
It will bog down then die when going 52 mph (fully open and as fast as I can go) never really went further than 1 mile at full speed.
Sometimes it will stall when I am down shifting.
Occasionally hard to start when cold.
Whenever it dies on me I have to wait about 5-10 mins before it will fire up again... then it will go about a half mile before dying again. (I always end up pushing it back to my house.
Carb has this sucking noise whenever I give it gas

Here is what I have done:
Oil change (10w40)
Valve adjustment (.002 intake .004 exhaust)
Braided silicone hose on secondary air injection (Factory one burst)
Continually have tried adjusting the carb (fuel/air screw)
Took carb apart and inspected everything (105 main jet, idle jet did not have a number on it?)
Put 1 then 2 then 3 washers under the needle (this helped with cold start but still died on me!)
I even got pissed off and bought a brand new pz30 carb.... same thing!

Any help would be greatly appreciated.

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