Cb125 rebuild

Is it really easy as i have been reading on forums to do a top end rebuild on these little guys. I've never done one. What special tools would i need? My bother is selling me his for cheap and i thought it would be a good learning experience. Browsed eBay and saw this http://www.ebay.com/itm/SINGLE-CYLINDER-TOP-END-REBUILD-KIT-HONDA-CB125S-CL125S-SL125-XL125-OHC-ENGINE-/311000751024

If you're just planning on pulling the top end, checking everything, and replacing gaskets the fanciest tool you should need is a torque wrench. These motors are super simple, and as long as the valves and cam are in good shape it'll be a breeze. Bonus is the engines are super easy to take out of the frame, since they weigh nothing.