IT's better to have protection than not. I dont see how a sprocket guard paring up with this texieria skid i just got, would be a problem. If anything.... yeah i'd keep extra parts at my disposal in case something happens. The odds of that is fairly slim i'd say.
To answer baileygunns's question. Well it's actually complete but it feels like i need to replace right wheel hubs. It wobbles some when i took the bike for a spin. or maybe it could be the tires lol. Other things i need are headlight, tail light, and install the ccp stabilizer. That will come in spring after i get a job again.
edit: oh and a tachmeter. my trailtech vapor broke when the bike rolled lol.