FYI, I've gone to the stops with the gear changes on my 250 and my 125 and it is no problem for commuting purposes (I'm not small either)
took my 250 from a 47 tooth rear to a 37, no prob once you are used to it. The problem seems to be mostly one of perception.
took my cb125 from a 15 front to a 17 no prob, and have a 34 tooth rear en route(was 40). Here's some chicken scratch on gearing changes FYI (though I'm sure Old Mechanic has it all sorted out)
http://ecomodder.com/forum/showthrea...ges-18082.html