If you really really have to. Try a rear fender rubber plug from dealer. I didn't want speaker pods on my ultra style trunk and filled the holes with rubber fender plugs.
fffing strange - i just found this post after installing mine a few minutes ago. I was like WTF!!!! a hOle!!! so made a black delrin bar end plug due to my odd paranoia. They do seem comfortable though and they will be used for a while on labor day.....
thanks everyone. i probably err on the comment of paranoia about rain, spiders or bees. i will leave the well enough alone - unless i find some cool tassels.
those are specially designed vent holes to prevent heat build up from the throttle by wire system. i think the coke bottle type nostalgia grips are very comfortable. i've had a few sets on my past harleys and i am using them on my streetglide. they just fit the hands great.
What were the holes "specially designed" for before the TBW came on the scene in '08?
Joker Machine makes plugs for that exact application They are made for there Coke Bottle style grips but sure they would fit the harley ones just fine.No need for any silicone or adhesive they have a lip on them and pop right in.They only come in brushed finish but I had mine powder coated black, looked great with the white grips.Hope this helps