Shutter speed is too fast for my Yongnuo 560ll?

So I get black bars on my photos I believe caused by my shutter is faster the the flash. Is there any way to fix this with a Yongnuo 560ll?

I do know my flash does not have flash sync. Will I just have to suffer with a lower shutter or is there a way past this? If it matters, I have a Nikon D7100, Thanks!

Your shutter speed with flash is determined by the flash duration not the length of time the shutter is open. A flash is in the region of 1/10,000 or 1/100,00th sec so that becomes your shutter speed. So long as the shutter fully opens before the flash fires and closes after the flash happens then your exposure will be correct. Unless siginificant ambient light is present then with flash there's no difference between 10 seconds and 1/200th sec shutter speeds.

According to Nikon, you can use a flash with the D7100 at shutter speeds of up to and including 1/250th of a second. I'm surprised though that the D7100 isn't recognizing that there's a flash attached to the hot shoe and therefore preventing the shutter speed from exceeding 1/250th. Especially if your flash has multiple pins on the base of the shoe, but if it only has a single pin then this would be normal operation.

Your flash does have flash sync, or it wouldn't work at all.

Your max shutter speed when using flash is either 1/200th or 1/250th, your manual will tell you which. If you get top/bottom cut off at this speed, slow the shutter down by 1/3 stop or 1/2 stop at a time until you lose the black bars, and that is your max sync speed with that flash.

The flash unit's flash duration is what stops the action. I spent many years shooting action shoots with the synched shutter speed of 1/60th of a second on my 35mm SLR film cameras. If you have set your camera to the wrong shutter speed part of your picture will not be synched with your flash unit causing an uneven exposure. Consult your camera manual to find the flash setting and/or the proper synch speed to use with flash.

Set your shutter speed to 1/200 sec or less. You should not need faster shutter speeds when using flash, unless you are trying to kill the ambient light & it's bright daylight.

The D7100 has a recommended synch speed - find out what it is and set it manually.

Of course, your flash may be defective, if it's setting the wrong synch speed - the wrong speed is indicated by one side of the image being blacked out (due to the way a focal plane shutter works) not black bars in the middle.

With a TTL compatible flash, the camera body is smart enough to know it is there and not exceed the x-sync speed. Even in manual mode, with a TTL compatible flash attached and turned on the camera will give priority to staying within the x-sync speed. With a cheapo non-TTL flash, the camera will act as if it is not there, even though it will trigger the flash. It is up to the user to know enough not to go faster than x-sync speed. Either that or live with the effects.

Yes. That's normal. That's why all cameras have such a thing called maximum shutter sync speed. Check your camera manual. If you have no time for that now, try 1/125s to be safe.

Let's go back to basic principles. Any DSLR has a max speed for electronic flash, and that applies to any brand of flash. Answers so far suggest that 1/200th is max on the D7100, but check in your book. It may be that independent brands of flash need a slower shutter speed with the D7100, so maybe try 1/160 or 1/125 if 1/200 is no good. You may need to set the shutter speed manually, rather than relying on the camera to recognize your flashgun. Is your Yongnuo flash specifically set up for Nikon DSLRs?

All modern cameras have "synchronization" - that word simply means "setting off the flash at the same time as the shutter". It is many decades, probably 60 years, since any camera was designed without synchronization.