It would be easy to assume that the engine in the XJ550 was just a destroked 650, but that ain’t fair. It was almost an all-new design, with a 6-speed transmission, chain final drive, and a new cylinder head with Yamaha’s YICS system that enabled 50+ mpg fuel consumption. It was a solid mid-sized motorcycle with a love it or hate it front fairing. But that won’t matter in this case, because this Seca’s been built for vintage racing!
The seller calls this a “period race bike” that’s recently been gone through and is ready to ride. It’s equipped with Mikuni 29mm smoothbore carbs, CalFab aluminum swingarm, and a newly built motor with Cometic gaskets, titanium valves, heavy duty valve springs, race pistons, and Moriwaki camshafts.
Find this Seca racer for sale in Greer, South Carolina for $4,100 here on Facebook Marketplace.