Originally Posted by MikeO
Video recorded this morning when the engine was cold...
That sounds like the right side TB shaft and bushing are shot. I did mine on my 02 GSA with 90K on it, settled that knocking right down. Then 2K later I did the left side both were pretty well shot. I order the kit from Dan Cata, worked perfectly. If you want to be sure it's the TB shaft, put your finger against the inside of the TB and press on the shaft cover, see if the knocking stops or changes pitch, if so, that's your problem.
R75/5, R75/5 Vintage Racer, R100RS, R100CS, 1100S BCR, 1150GSA, WR450
R80RT Sold, 1150RT Traded, RC51 Sold, KLR685 Sold, W650 Sold to Brother, CB1100F Traded