Jerking when at higher speeds

Does your bike idle good when you have the clutch in? This sounds like a problem i had. Yo are loosing compression from the muffler gasket and carb intake. You will need to take the muffler gasket off and use high temp RTV in its place. That would be the orange kind. Same goes for the carb. I hope this helps

Could be a running to lean condition that is causing it to cut out at High RPM's or maybe in the drive trane, or could be that the float setting in the carb. is not right and the engine is starving for fuel at those high RPS's.

How many miles do you have on your engine?

Did it just start doing this or has it done it since you had it going?

There is more than one thing that could be causing this problem, so I say check everything very good and start with removing the spark plug and see what the color of it is, if it is very light to hite in color, move the clip down one nothch on the mtering needle in the carb. clean the spark plug very good and test it again to see how it runs, even if it runs good and the "jerking" stops you should still check the plug and make sure it is a medium to light brown, if it is still very light white or gray then move the clip down another notch and repeat the rest until the plugis that medium to light brown. there are soem other variables to this proccess, if you are running Opti II oil it will probably be a little lighter than it will be with conventional oils.

Maybe this will be a start for ya and I'm sure others will chime in here and possibly give you some even better advise.....

Best wishes....Peace

I've been tinkering w/mine today and the same situation happened to me boggin @ high rpm's . I had adjusted my intake needle in my carb and then it started doin it too me and I thinx I done it myself but none the less same ting good luck

Is there also a 'popping' sound??
Many don't realize this, but the chain can vibrate at higher speeds & snag the edges of the sprocket teeth, causing a popping sound & a slight hesitation.
The solution is to file the sides of the teeth so that they feed into the chain links smoothly.

Adjusting your idle shouldn't have anything to do with it, but it will have increased your engines thirst for fuel. Could be your kit petcock with internal filter doesn't supply enough fuel and the carb bowl gets close to empty. I had this same problem on my red bike on profile. I tossed that stupid internal filter on petcock and stick with a single inline universal fuel filter.

The petcock itself likely has a little filter screwed on it. You remove the petcock, unscrew that filter, chuck it as far as you can, then screw petcock back in tank. Some people here like that little filter, but I never have. Never done any good for me, and it's not needed IMHO.

Try losening the gas cap to see if it flows more gas. If it does the vent is restricted.

I've had the same problem as the OP, with the stock sprocket adapter and with my hub adapter. I thought it was the sprocket, too. It definitely runs smoother with a hub adapter but still bogs slightly at high RPMs. I think I'm going to try the petcock filter because I never really cared for it either. You would think it would become clogged very quickly based on how small it is.