I own a 2006 dyna wide glide with 23,000 miles.I noticed the mini ape handlebars have are slightly loose ( front to back).They have 2 large bolts with polyurethane bushings.Do I want a little play in there to prevent excessive vibration when ridding?

 

I think they always have a little play and thats why a lot of people get the poly bushings. The poly bushings will firm things up, but it adds vibration to your mirrors etc...

 

Your old bushings may be worn out. Either get OEM replacements or aftermarket polyurethanes. As mentioned, poly's will be stiffer and transmit vibration to your bars. I would just stick with Rubber OEM bushings to avoid the vibration, especially if you stay with the stock bars.