it's time to get a new chain, since the bike is new to me I want to make sure I have my facts straight, it's a 98 900rr, stock sprocket sizes are 16T front and 42T rear with a 525 pitch? If I go to a 15T front I will have better acceleration but lower top speed? the 15T front will also lift the front wheel a little easier? I plan to run the bike down the 1/4mile once or twice but mostly street riding often with a passenger. will the 15T front make 2 up riding uncomfortable and what effect will it have on the speedo? will a aluminum rear make a difference? any advice on what brands are better?