My Supercheap air impact wrench has failed me; I can't get this damn front sprocket nut off the Minja. I'm currently at the point of twisting socket extensions with a breaker bar. Has anyone got a more heavy duty rattlegun I can borrow to get this f*cker off? My compressor goes to around 120psi I think. Or is my thinking wrong? I don't believe it's a reverse thread bolt - it doesn't say anything like that in the service manual.