I had some wear tears under the front of my stock RK seat, rubbed there by the fairly sharp back end of my tank dash. I got some vinyl repair (in a tube) from the local auto parts store, and used that to effect a repair. Not only did it stop further damage, but it toughened up the area being rubbed, so no further damage is occuring. If interested, PM me to remind me to look, and I can find my tube and post the brand and product...
Enjoy,
Rich P