I've been looking for a throttle control for my Thruxton and I've found it at WWW.2wheelride.com
I wanted :
Easy to install
Easy to use
It is one piece, no moving parts.
Takes literally 2 seconds to install
one finger control
$20 plus shipping
When it comes to ordering there's not much to confuse you. There are only two sizes (one for Harley with the 1" bars and one for the rest of the bikes with 7/8" bars) and two colors (black and silver).
Just installed it on my bike and it does just what I want it to do.