I recently just purchased a 1999 sv 650 s and i **** love it, i had an inline 4 before this, and i must say that this bike is alot more fun. Stock, i know the sv comes with 160 rear tire, but recently i decided to upgrade to a 170, i was just wandering if anything larger than a 170 rear tire would add to or decrease the performance of this bike. I appreciate any info anyone can give me.