Nor would I normally but I just couldn't shift that 50 mm spring holder nut . I bought a clutch holding tool and the biggest socket wrench you ever saw plus a 4ft piece of scaffolding. I had a piece of 4 by 2 wood through the back wheel but eventually the pins fell out of the clutch holding tool and I was just not feeling right about it . The bike workshop that did it , which is a 10 minute job , asked me to take the bike in on a Monday . Half past five on the Friday and they still haven't done it so a weeks holiday was wasted phoning them up every day . Anyway I've got the loan of a Snap-on impact wrench so , as you rightly say , I wouldn't trust anyone to work on my bike either. So now that you have unleashed this extra power what are you doing for a clutch on the Busa ? I only mention this because my previous clutch only started slipping when I added a Dynojet kit . This is what happened to the holding tool , luckily the pegs didn't end up in the sump .