![]() ![]() Capable of running the quarter mile in the high 13-second range, the XS650 was as fast as many of the top muscle cars of the era at the dragstrip. The Yamaha XS650 was used successfully as a street bike and a race bike. ![]() The overhead cam valvetrain allowed for an engine that revved quickly, made great power, and did not require constant valve lash adjustments. Compared to its pushrod-driven British counterparts with origins in the late 1930s to 1940s, the Yamaha’s 650cc parallel-twin engine featured a single overhead cam. The XS650 had one of the world's most modern large displacement parallel twin engines in the world when it hit the market. The Yamaha XS650, then and now, is an excellent alternative to the Triumph, BSA, and Norton twins of the day. When the Yamaha company unveiled the new 1970 XS650, they fired a shot across the bow of the entire British motorcycle industry. ![]()
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