Quick Action Throttle Insert
If you want a quicker/shorter throttle twist/action, you can fit an insert onto your existing throttle,
You were able to get machined plastic Throttle Inserts from Riffleman, at Double Z Racing
a few years back (2010 - 2012), but I am not sure if these are available today !!!
Or fit the Throttle Tube from another Kawasaki, or fit a completely different throttle assembly.
You can make a throttle insert quite easily, if you have the right tools, or you may be able to buy a quick action throttle insert.
Or fit the throttle tube from a number of Kawasaki's
OEM part Number : GRIP-ASSY,THROTTLE
On some bikes you may find that the throttle inner cable will be too short and tight even after slackening the screw adjusters. You will be able to shorten the outer cable a small amount