After being a bit frustrated with the "snatch" of the throttle on my WR250R, I did some research (mainly from this forum) and decided to give adjusting the TPS a go. Below is a video I made showing how I adjusted the TPS using a low-profile ratcheting bit wrench I found on Amazon with a cut-down t-25 torx bit. Hope someone finds it helpful.
Video: https://www.youtube.com/watch?v=sidLqlHtH-E
Low-profile ratcheting bit wrench: https://www.amazon.com/Neiko-03044A-Ratcheting-Screwdriver-Close-Quarters/dp/B000XYOUS6/
After going from 15 to 19/20, the throttle snatch is a bit better at low speed and the engine braking doesn't seem as exaggerated as it was before. I'm happy with the results but will probably be looking to a fuel programmer in the future to see if it helps any.