Thats excellent mileage, although it is probably on the high side unless you're measuring via GPS. The stock tach is off by around 5 mph at 65. The difference changes to almost 10mph when you get over 100. I've since swapped out my tach for a Veypor which is set to my GPS. Now I get around mid 30's to 40s for fuel mileage depending on how hard I'm riding. I'm hoping to take the entire bike apart this fall/winter and do a rebuild and some motor tuning to see if I can improve things and reduce snatch. The bike is riding a lot rougher after 20,000 miles and is in need of a good cleaning.