the idle kit can be purchased seperatly I used it on 28mm khein carbs so I didnt need idle kit or caps.
Motion pro also sells this kit with throttle, cable,caps and adjuster screws only for about 65 bucks and also requires you to get idle screws seperate.
heres a pic. that I found from a motion pro THIS IS NOT THE ACTUAL ITEM JUST TO GIVE YOU AN IDEA OF WHAT I HAVE MY ITEM IS USED BUT IN GOOD CONDITION. ONLY THE CABLE, CAPS AND ADJUSTER SCREWS IS WHAT i GOT NO THROTTLE AND MY CABLE IS FOR A THUMB THROTTLE