I had a hell of a time getting my crank bolt out. I really dont see how you can use that rubber strap thing to possibly hold the crank pulley and break that puppy free. I had 2 spare axle nuts from a quad that were the same size as the crank pulley. Welded those 2 together, then welded a old tire iron to the side of that. Rested that on the frame part and took another tire iron/lugnut tool the same size, and a 3ft bad and jumped on that for about 15sec before it finally popped.