Bob Yost has been making carburetor hop-up kits for more years than he likes to admit. His Power-Tubes are world-famous for their ability to wake up anemic carburetors. When Bob introduced the ...
Harley-Davidson has used the 40mm Keihin constant velocity (CV) carburetor since 1988 on Sportsters and introduced them in 1990 on the Big Twins. The 1988 model differed from the 1989-and-later carbs ...
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