Finally a Tumblr made for guys who are turned on by women who ride motorcycles "themotolady.com"
You didn't think I was just going to post perfectly unreal beautiful women on cafe racers and sports bikes did you? You ought to know by know I'm going to pass on them and see about the woman on the Flying Merkel straight away.
A bit of everything motorcycle on http://themotolady.com/ and it's not strict on the women on bikes theme, but its about 90/10 women to men. Great site, enjoy