I've been reading a lot about sliders in this forum but is very technical and also people are expecting increased mpg, speed or both depending on the sliders they use. All I want to know is what grams I should get to just continue using my bike and not to increase anything. I read 19g is the recommend but 20g is the stock weight. Which one should be used if all I want is to maintain the bike? Also, in basic terms, what is the purpose of the sliders?