I had to give on mine. There was no way any amount of force was going to get it on. i broke teh bras screws trying. I switched to a strap wrench - nothing ! I kow it doesn't make sense because the cap on the '06 Speedy is the same as all others but the Kury simply did not fit my bike.

'06 Speedmaster, DBA Performance Pipes, re-jetted, needles, Snorkel / AI removed, shiny bits......