Been using licks 10" non-knurled handlebars. I notice my bars keep slipping every few rides and I will have to retighten them. This is like the 4th time. Do these clamp screws actually come loose? It concerns me how I am still able to tighten the screws to this point it could be overtightened. Im not sure if this is normal. Are my clamps damaged or do the screw actually do come loose? Will knurling prevent this from happening again?

 

Maybe add a bit of blue loctite, knurling the bars will help give some bite.

 

Get a cheap knurling tool and do it yourself or wrap some emory cloth around the bars in the clamp.

 

and some blue lock tight. knurling would help tremendously

 

Go to Home Depot or Lowes and get some sheets of aluminum mesh that contractors use to
hold plaster to drywall seams
A strip around the bars under the handlebar clamps holds my non-knurled Biltwell Chumps
really well...and YES use blue loctite !
Good Luck
Dante

 

Some bicycle assembly compound would probably do the trick, this stuff is specifically made to prevent handlebars, seatposts, etc. from slipping and really works in my experience...several suppliers make it aside from Park

 

This! seen it a few times work great.

 

I use that stuff on my mtn bike seatpost. Does work. Didn't think to use it on my bike-with-an-engine.

Biltwell specifies why they don't knurl their bars, claiming less clamping power between the different materials (bars/clamps).
The chrome biltwell flyers I had liked to slip every time I hit a pothole. It was dangerous, near loss of control at 60+mph. Tightened the friggin' things down tighter and no more slipping. Was probably past torque spec, didn't care.
The new non-chrome tracker bars do not slip at all with less torque on the clamps. Anyways, that Park tool stuff above should work to cure what the OP is experiencing.

 

Basically its lapping compound, I have used it and it works.

 

The other thing to check is the screws are done up to the correct torque. I have found on some screws I would of stopped but a torque wrench showed I should of done a nut or bolt up tighter.
The FSM shows an order to do the screws up although I did mine to give an even gap on the clamp.