My Ultra has the air thru the handle bars..

I wan't some new grips and finding some with a center hole for the left grip is imposible. Can I use newer grips and just remove the end cap or the grip to check the air in the front forks ?

How hard would it be to reroute the air valve ?

 

These grips have the removeable end caps, just for access to the air fittings.........these will work for ya http://www.lockitt.com/AccessoriesGrips4.htm#Iso_HD

 

I guess it would depend on what kind you want. Many grips available thru HD have provisions for the valve.

And re-routing the valve/hose would be no problem however, the handlebars act as a reservoir and you would have to add some sort of tank (reservoir) in order to keep the correct air volume for proper operation of the air dampening design.