Don Castro Triumph Flat Track

This beauty isn’t a show bike from the 70s: it’s the actual factory ‘Red Line’-framed 750 cc Triumph ridden by AMA Flat Track star Don Castro. The psychedelic streamlined bodywork came from a sponsor called The Fiberglas Works; it was outlawed by the AMA for violating the anti-slipstreaming rules after just one outing, at the 1972 San Jose Half Mile. The Bonneville-engined bike has since been restored by Don Miller of clothing company MetroRacing.com, a long-time supporter of vintage racing. “The whole resto has been off and on for a long time. I started by obtaining that bodywork over 10...