Aerocharger to help pump the XB horsepower to 150 hp (110 kW), but the Aerocharger supplier deal fell through when Harley Davidson decided to engineer one in house. That project was a failure, despite “millions of dollars” spent. The first XB9 engines had a 985 cc (60.1 cu in) displacement, the later XB12 engines had 1,203 cc (73.4 cu in). Before the first XB was sold, the cost was well over the target, leading to a sales price increase from the original price of $7,995 to $9,995. It was a popular bike, but never sold at Harley marketing department’s expected volume, partly due to the significantly higher price. Buell introduced the XB frame in the 2002 Firebolt XB9R sportbike. The Firebolt XB12R was introduced in 2004 and was initially sold alongside the smaller displacement Firebolt XB9R. The Lightning came in 2003 and was marketed by Buell as a streetfighter motorcycle. Buell’s Ulysses XB12X debuted in July 2005. It offers seating, ergonomics, and long-travel suspension that are well- suited for use on unpaved and rough (fire)roads. Buell advertised the Ulysses as “the world’s first adventure sportbike.” For 2008, 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. It has a different front fender, unlike the Enduro-front fender that comes on the XB12X and lower fork protection is not as pronounced as on the XB12X, due to the intended purpose of the XB12XT which is more street than dirt oriented. Other major differences include the suspension which is completely different between the two bikes, being about an inch lower on the XB12XT and tuned more for street riding, vs. the XB12X’s slightly taller and softer suspension better tuned for dirt use. Along with factory Hepco & Becker hard panniers and top box, tall windshield and a 30.9 in (785 mm) seat height, the XB12XT also has wheels that are approximately 1 lb (450 g) lighter than those found on the XB12X, which have added mass to make them stronger for off paved road use.[30] The XB12XP is a police model that was available for the 2009 model year. Buell 1125R In July 2007, Buell announced the 1125R, a sport bike that departed from Buell’s history of using Harley-Davidson Sportster based middle weight powertrains and tapping into the XBRR racing bike learnings. The Rotax Helicon powertrain uses four valves per cylinder, dual over-head cam, liquid-cooled 72 degree V-Twin displacing 1,125 cc and producing 146 hp (109 kW). It produces 83 ft·lbf (113 N·m) of peak torque but varies less than 6 ft·lbf (8.1 N·m) of torque from 3,000 to 10,500 rpm. There is a vacuum assist slipper clutch to give predictable drive performance in hard cornering and deceleration and a six- speed transmission. The Helicon engine was developed and built by BRP-Powertrain in Austria. The design had significant Buell input and was funded through Buell’s cashflow. The 1125R did not have a full fairing, as that would have put it in the same class as Japanese sportbikes. Erik Buell agonized over this, saying “it’s not about listening to the voice of the customer.” Cycle World magazine said the 1125R was “a bit of an oddity.” The bike was initially released with a crude spark map, leading to criticism of the bike at low speeds. The Rotax Helicon also ended up costing significantly more by production time due to fluctuation in exchange rates. 1125CR For the 2009 model year, Buell introduced the 1125CR, a version of the 1125R in the cafe racer style.[10][31] This was done in response to customer feedback, which said the 1125R wasn’t what was wanted, and causing Buell to shelve plans for a Streetfighter, going for a cafe racer instead. The 1125CR has a longer swingarm, a longer wheelbase and a shorter secondary drive ratio. Racing - Buell XBRR Buell XBRR Buell also produced a limited series of 50 XBRR (1,339 cc or 81.7 cu in, 150 hp or 110 kW) racing-only machines for factory-backed and privateer racing Buehl