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Cal Rayborn won the first... Cal Rayborn won the first of back-to-back victories at the Daytona 200 on a side-valve 750 KR model. In 1970, the 750 KR was replaced by the XR-750. - Harley-Davidson Archives Copyright H-D Sportster Milestones | 1957 | Sportster XL 883cc, 7.5:1 | | | CR Introduction | | 1957-65 | Linkert DC Carb | | 1957-66 | Kick-start | | 1957-71 | Early-style barrel oil pump | | 1957-77 | Original cradle frame | | 1958 | 9:1 CR, larger Valves | | 1965 | 12v Generator | | 1966-71 | Tillotson Carb | | 1967-79 | Electric Start option and/or | | | kick start | | 1969 | Last Magneto Ignition | | 1969 | New Cylinder Head Casting | | 1970 | Distributor-only Ignition | | 1971-early 78 | Points & Mechanical | | | advance Ignition | 1971 | 1st Cone-style Ignition gear | | | cover | | 1971 | Wet Clutch w/single spring | | 1972 | 1000cc engine replaces | | | 883cc engine | | 1972-75 | Bendix Carb | | 1972-76 | Late-style barrel oil pump | | 1973 | 1st AMF production Harley | | | models | | 1973 | 35mm Kayaba forks & | | | single-disk front brake | | 1975 | 35mm Showa forks | | 1976-87 | Keihin butterfly carb (not CV) | | 1977 | Gerotor oil pump | | 1978 late-79 | Electronic & Mechanical Ignition | | 1979 | Last year for XLCH | | 1979-81 | 2nd Generation Frame | | 1980 | Electric Start Only |
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