What type of master link are you using, Rivet or Clip Style? If Rivet, start off by getting a chain break / riveting tool. Motion pro makes a decent one but I recommend the RK Kit. A bit pricey but well worth it.
If you going with a clip style master link you dont even need a chain tool. You can hacksaw or grind off the old chain and the new one will simply snaps on with some pliers.
This was a decent writeup on webbikeworld.
http://www.webbikeworld.com/t2/motorcycle-chain-sprocket/