A little bit about my bike

Got my 2014 xt660z in grey a few months ago, and been adding mods since

Mods so far...
Renthal bars with risers and guards
Single sided MTC exhaust with tool tube on opposite side (for the dreaded puncher)
Got a Pipper cross foam air filter to fit when I get the o2 sensor and fuel mod (they are on the way)
And a top box fitted

Things I love about the bike, how well balanced it is (for its weight), the comfy seat and relaxed riding position ,the pop from the exhaust when I let off the throttle
Im looking forward to the amount of fun I'm going to have on it

I have a couple of question if Anyone can help/give advice
1st are the o2 sensor and fuel mod tricky to fit???
2nd advice on long trips (I am doing the Stella this year)

Any help/advice is welcome

Take care all. jonny boom