On My TS 250/1 and as per Malcom I put 4 hexagonal threaded through spacer bolts (basically 1.5″ length bolts as used to connect 2 different threaded rods), between the frame and the seat. I too am tall so helped me with the shock vibration also I found some of the older ES foot rest pegs (much thicker). You may wish to look at some of the Indian copy (Royal Enfield) pegs (rubbers), these have a slightly smaller inner diameter but I am sure they can be persuaded to fit the tubing if you heat in hot water and lube them. I paid £1.99 post inc from India…. Raises the centre of gravity but I don’t notice it at all>>>>>
ATB