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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”


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



expected volume,

partly due to the

significantly higher


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


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


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.


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