2001 Buell M2 Cyclone

By ex-Harley-Davidson engineer Erik Buell. Harley-Davidson acquired 49 percent of Buell

And Buell became a wholly owned subsidiary of Harley-Davidson by 2003. On November 17, 2006, Buell announced that it had produced and shipped its 100,000th motorcycle.

Until 2003, along with a mechanically identical S3T "Touring" model that ran through model year 2000. The 1,203 cc air-cooled V-Twin engine was mounted as a stressed member in a tubular frame. And jumped to 101 hp (75 kW) in the following years due to revised cam profiles and the new Thunderstorm cylinder heads. While the bike's overall look was the same throughout the model run, there were significant changes made

That set it, and later models, apart from the 1997 and 1998 bikes. The early bikes used a rectangular section steel rear swingarm, WP Suspension front forks and rear shock, a Keihin 40 mm CV carburetor, and a Performance Machine six-piston front brake caliper. A new cast aluminum rear swingarm was utilized along with Showa front suspension forks and rear shock. The front brake caliper, while still a six-piston unit, was now made by Nissin.

And was marketed by Buell as a streetfighter motorcycle. The XB9 engines had a displacement of 984 cc (60.05 cu in), and the later XB12 engines had 1,203 cc (73.4 cu in).

And was initially sold alongside the smaller displacement Firebolt XB9R. The Lightning came

Among other changes, XBRR oil pump and ignition timing systems have been changed tapping into the XBRR race bike as well as the addition of heated grips and increased turning fork swing from 54° to 74°. The Ulysses XB12XT differs from the Ulysses XB12X in several areas.

Buell introduced the 1125CR, a version of the 1125R in the cafe racer style. It was done in response to customer feedback, which said the 1125R was not what was wanted, and causing Buell to shelve plans for a streetfighter, going for a cafe racer instead.

To 2020 to build out their model line up to approximately ten models

. The models will include variations for touring, dirt, adventure, and cruisers.