Further to the front sprocket saga; I ended up buying a Virago rear sprocket and a 520 chain to go with the 17 tooth front sprocket already purchased and yipeeee it all fits great! I still have the original 530 chain and rear sprocket to use up some time but am happy cruisin' with the slightly higher gearing. I'm a bit on the heavy side so don't think my bike will take any higher gearing without it struggling on the hills, I would guess any lighter riders could certainly raise their gearing a tad more to increase their mpg. The bike is also slghtly smoother wth less vibration (clearer view in the mirrors), though having said that it wasn't bad in the first place.