Installing the OEM Yamaha R6 throttle tube on your Yamaha R3 is one of the easiest ways to improve the feel and usability of the throttle as the R6 throttle tube has about a 15-20% shorter throw than the stock R3 one.
Doing this install is fairly quick - it takes about 20 minutes or so to do the whole thing.
Since it's using an OEM Yamaha part, it also looks great and like nothing was ever changed.

Yamaha R6 Throttle Tube w/ Grip:
https://www.partzilla.com/product/yam...

OEM Yamaha part number:
2C0-26240-00-00

Tools you'll need:
• Small Philips screwdriver
• Pliers
• Vise-grip or similar style pliers
• 5mm allen/hex key