AFT's History of the XR750

American Flat Track's website is continuing their interesting history of the development the XR750, 50 years old this year. They talk to engineer/tuner Bill Werner and racer Scott Parker and go into the depths of port shape and valve spring material

Go to American Flat Track to read more.

#harleydavidson #xr750 #ScottParker #AmericanFlatTrack #BillWerner