One of the reasons I started using TCW-3 is I had a "jerkiness" for yrs when crusing at about 35mph in suburban streets even after a good carb cleaning, Steve's 2MM and T Cro's Stick Coils. So I did a compression check and had 3 cyls at 190 psi and #2 cyl at 170 psi. A teaspoon of oil in that cyl bought the pressure upto 185 psi. Looked like a ring problem. Talked to "guru" Steve and he suggested maybe a stuck ring due to carbon. He suggested using TCW-3 might remove carbon and free up the ring. So after using it for about 3 months one day I noticed the "jerkiness" was gone. Did a compresssion test and all cyls were back to normal psi. The claim is that it removes-reduces carbon. Really don't know for sure but I like the results in a smoother running bike.