How to take off the crank sprocket???

[97spydagst]

does anyone know how to take off the crank sprocket im changeing over the front case off my old 7 bolt that walked and puttin it on my new one. Everything else came off easy but this one just spins any ideas??

 

[Lunch_Box]

Impact wrench.

 

[DevilSperm]

or for those of us who dont own air tools, http://vfaq.com/mods/cranktool.html

 

[97spydagst]

ok thanks guys

 

[gsxAWDdsm692]

I can't get my crank bolt out either. I've been trying all day with a breaker bar and it wont budge. Will it deff come out with air tools?