Flathead race engines finally became extinct November 1968, when the AMA Class C rules committee legalized overhead-valve 750cc engines for Nationals competition. Previously, overhead-valve engines were limited to 500cc displacement, while sidevalves could be 750cc. The new rules caught ...
Publisher, author, motorcycle historian and 1972 Daytona 200 winner Don Emde’s most recent book The Speed Kings is a history of boardtrack racing that’s long overdue. It’s perhaps the most complete history of the sport to date, one that includes hundreds of period photos supported by ...
1972 Yamaha R5 350 Engine: 347cc air-cooled 2-stroke parallel twin, 64mm x 54mm bore and stroke, 7.5:1 compression ratio, 36hp @ 7,000rpm (claimed, 1970 model) Top speed: 100mph (claimed), 95.31mph (period test, 1970 model) Carburetion: Two Mikuni VMSC 28mm Transmission: 5-speed ...
1960 Yamaha YDS 1 Scrambler Engine: 246cc air-cooled OHV 2-stroke parallel twin, 56mm x 50mm bore and stroke, 8:1 compression ratio, 20hp @ 7,500rpm (claimed) Top speed: N/A Carburetion: Two 20mm Mikuni VM 20 Transmission: 5-speed, chain final drive Electrics: 12v, flywheel magneto ...
Ricky Graham, feet-up sliding a Harley-Davidson XR750 prepared by Tex Peel at the 1983 Springfield Mile, was among the greatest Mile racers of all time.There are great flat track racers, and then there are great flat track racers. Consider the late Ricky Graham, who billed himself ...
What’s the longest wheelie you’ve ever pulled on a motorcycle? Fifty feet? A football field? Perhaps a full mile? Doug Domokos, aka the Wheelie King, rode a bike for 145 miles without letting the front tire even so much as dab the pavement. That was a Guinness World Record, one he set in ...
If you’re seeking balance in the universe, consider Don Emde’s 1972 Daytona 200 win. His ride aboard a privately entered Yamaha TR3 is considered a major upset in Daytona history. Facing an army of factory-prepped 750cc bikes capable of speeds in excess of 170mph on Daytona’s steep ...
Only a few years after the CB750 Four’s landmark 1969 debut, Honda Motor Co.’s movers and shakers determined that it was time for a replacement. The bike that had once rocked the motorcycle establishment with its single-overhead cam, 4-cylinder inline engine was growing long in the tooth. ...
1979 Honda CB750K Limited Engine: 748.7cc air-cooled DOHC transverse-mounted inline four, 62mm x 62mm bore and stroke, 9.0:1 compression ratio, 55.9hp @ 9,000rpm (period test) Top speed: 124mph (period test) Carburetion: Four 30mm Keihin constant-velocity, one accelerator pump Transmission: ...
All member of the Trailblazers hall of Fame are invited for a group photo at the end of each banquet.Seventy-five years is a rather long time. In the doggie world that’s 525 years, and in real terms 75 years equates to three-quarters of a century. Closer to home in the motorcycle ...
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