Here are all of the components that comprise the throttle.
Photo courtesy of Gregory Bender.
Start with the rub block.
Photo courtesy of Gregory Bender.
Fit the metal plate first. Note that I've applied some grease to the surface on which the throttle tube will rotate.
Photo courtesy of Gregory Bender.
Then fit the rubber friction block.
Photo courtesy of Gregory Bender.
Fit the throttle tube, locating the chain pull properly.
Photo courtesy of Gregory Bender.
Slide the retaining washer over the tube.
Photo courtesy of Gregory Bender.
Fit the retaining washer.
Photo courtesy of Gregory Bender.
Slide the retaining ring over the tube.
Photo courtesy of Gregory Bender.
Fit the retaining ring in place within its groove.
Photo courtesy of Gregory Bender.
Slide the friction ring in place.
Photo courtesy of Gregory Bender.
Fit the friction ring in place. The one in the photo is metal. Some are plastic.
Photo courtesy of Gregory Bender.
This is the thumb screw and spring that will press against the rub block. The spring is cone shaped. The smaller diameter end should fit against the head of the thumb screw.