Thought that was more porno spam when I saw your title.
Here's a corrected messeage-its a 27mm
you need not 24mm-sorry for confusion and thanks to dallason for pointing out the error of my ways
You need 22mm and 27mm sockets. I HIGHLY recommend getting the 6 sided impact sockets. Many of us have experienced well over-torqued nuts on a number of places on the V. Particularly on the rear sprocket nut and engine sprocket nut.
If you get the regular old chrome multifaced sockets they tend to split or round off the nut.
If you live in USA, www.Harborfreight.com
is a great place to pick up great value tools, torque wrenches, sockets, hex wrenches etc.
BTW, you'll need a big hex 14mm (not in your average tool kit) if you ever want to take the front wheel off.
Here's some torque values as well;
Engine Sprocket Nut 125 12.7 92 MO
Rear Axle Nut 108 11.0 80
Rear Sprocket Nuts 59 6.0 44
Speed Sensor Bolt 7.8 0.80 69 in·lb L
Speed Sensor Bracket Bolts 9.8 1.0 87 in·lb