Howdy, I am going to put a new front tire on my '72 XS650. I intend to put on a Dunlop K70 tire. My question is this... the tire comes in two sizes either a 3.25-19 or 3.50-19. I believe the stock size is 3.50-19. Is there any problem with going with the narrower 3.25-19? Thanks in advance.