Alright, When doing a long ride my hands fall asleep. I know a lot of newer bikes come with a throttle lock or thumb screw, mine how ever did not. I looked on line and found several places carrying them. Most were ugly or expensive. I'm a cheap ass, so I set out to make my own.
The idea came from my left hand bar end made from a PBR bottle cap. It only took a few beers to come up with the idea.
what you'll need;
JB weld: $5
1 bolt: $0.12 I suggest using coarse thread.
2 washer: $0.16 1 must fit inside the handle bar
nut: $0.12 again, must fit inside the handle bar
Beer bottle cap
small spring: $0.15
drill & bits
1. I removed the throttle assembly.
2. I took 1 washer, sanded it until it fit tightly inside my handle bars.
3. I used a hammer and punch to drive the washer into the bars about the width of the nut.
4. I mixed a small amount of JB weld. I used JB because I don't have a welder at the house and I wasn't sure it was going to work (Don't worry it does)
5. I put the nut on the end of the bolt, just enough to cover the thread; BUT do not go past the end of the nut (JB on the threads will make your task MUCH harder)
6. I applied the JB to the inside of the bars and the outside of the nut. then inserted them into the bars.
disclaimer: I went a little deeper than this; but this made for a better photo.
7. let dry for an hour or so. Have a beer or two.
8. I then drilled out the end of my grip. Large enough for the bolt to fit. You want to go a little larger than the bolt.
9. I then mixed some more JB and appoxied the bolt to the center of the beer cap. Also the spring was added. I ground the head of the bolt down to about 1/8 of an inch, to keep it low profile.
10. Put washer on as well.
11. Screw into the whole at the end of bar.
The spring keeps enough pressure on the bolt that it does not rattle out. When you reach desired speed give it a couple turns clockwise. The pressure from the spring onto the washer, presses against the grip, keeping it in position. The nice thing is you control how tightly it grabs,
Also the bolt is easily removed if you find it unattractive.