THROTTLE TUBES DO WHAT RIDE ON THE HANDLE BARS USUALLY ON GROOVES ON A SMOOTH NON PAINTED SURFACE SO THAT THEY TURN SMOOTHLY WELL HERES MY TECH TIP FOR THAT UNBOLT UN SKREW WHITCH EVER YOU HAVE THE THROTTLE TUBE PULL OFF THROTTLE TUBE AND TAKE WHITE GREASE AND BRUSH A LITTLE ON THE INSIDE OF THE TUBE OR BARS MARINE GREASE WILL WORK ANYTHING WATER PROOF THAT DOESNT DRY UP LITH GREASE IS THE BEST AND PUT BACK TOGETHER WHAT IT DOES IS KEEPS THE THROTTHLE TUBE FROM WEARING OUT THEY ARE PLASTIC GROOVES AND NOT DESIGNED TO LAST FOREVER BUT THIS TIP WILL EXTEND THE LIFE DRASTICALLY
