Buell Firebolt® XB12R

Powered by a 1203 cc Thunderstorm® air/oil/fan-cooled, fuel-injected 45° V-Twin, this is the motorcycle for riders who demand a premium-styled sportfighter with the perfect balance of horsepower and torque.


2008 Buell Firebolt® XB12R
Category: Super Sport


Type: Air/oil/fan-cooled 1203cc Thunderstorm® V-Twin
Valve Train: OHV, two valves per cylinder, self-adjusting
Bore x Stroke: 88.90 mm x 96.82 mm
Displacement: 1203 cc (73.4 cu. in.)
Compression Ratio: 10.0:1
Fuel Delivery: 49 mm down draft DDFI III fuel injection
Intake: Zero-resistance airbox
Exhaust: Tuned, tri-pass resonance chamber with InterActive valve and mass-centralized mounting
Torque: 114 NM @ 6000 RPM (84 ft. lbs. @ 6000 RPM)
Horsepower: 103 HP @ 6800 RPM
Lubrication: Dry-sump
Oil Capacity: 2.4 L
Oil Filtration: Screw-on disposable element

Primary Drive: Chain, 1.500:1 (57/38) ratio
Final Drive: Constant path, 14 mm pitch aramid-reinforced Goodyear® Hibrex® belt with Flexten® Plus technology, 2.407:1 (65/27) ratio
Clutch: Wet, multi-plate, compensated, reduced lever effort
Transmission: 5-speed, helical gear
Overall Ratio:
1st: 2.648
2nd: 1.892
3rd: 1.407
4th: 1.166
5th: 1.000

Frame: Aluminum frame with Uniplanar™ powertrain vibration isolation system, fuel in frame
Front Fork: 43 mm Showa® inverted forks with adjustable compression damping, rebound damping and spring preload
Rear Shock: Showa® coil-over monoshock with adjustable compression damping, rebound damping and spring preload
Color: Cherry Bomb Translucent or Hero Blue Translucent (New)
Front: 6-spoke, ZTL™ cast aluminum, 17 in. (432 mm) diameter, 3.5 in. (89 mm) width
Rear 6-spoke, cast aluminum, 17 in. (432 mm) diameter, 5.5 in. (140 mm) width
Front: ZTL™-type brake, 6-piston, fixed caliper, 375 mm single sided, inside out, stainless steel, floating rotor
Rear: Single piston, floating caliper; 240 mm stainless steel, fixed rotor
Suspension Travel:
Front: 120 mm
Rear: 127 mm

Overall Length: 1935 mm
Overall Width: 715 mm
Seat Height: 775 mm
Ground Clearance: 110 mm
Rake (at Steering Head): 21.0°
Fork Angle: 21.0°
Lean Angle:
Soft Contact, Right: 47°
Soft Contact, Left: 47°
Hard Contact, Right: 50°
Hard Contact, Left: 48°
Trail: 83 mm
Wheelbase: 1320 mm
Type: Pirelli®
Front: Diablo T, 120/70 ZR-17
Rear: Diablo T, 180/55 ZR-17
Fuel Capacity: 14.5 L (3.82 gal.)
Reserve Fuel Capacity: 2.8 L (0.75 gal.)
MPG (EPA urban/highway test):
Urban: 48 MPG (4.9 L/100 km)
Highway: 65 MPG (3.6 L/100 km)
Dry Weight: 179 kg
Gross Rating: 386 kg
Load Capacity: 177 kg

Battery: Sealed lead acid, maintenance-free, 12V, 12 amp/hour, 200 cca
Charging: 30-amp max permanent magnet single-phase alternator with solid-state regulator (405 watts@3,000 rpm, 405 watts peak)
Starting: 1.2 kW electric with solenoid shift starter motor engagement
Headlamps Type: Twin projector beam
Headlamps Description: 55-watt low beam, 55-watt high beam
Tail/Stop Lights: 5W/21W
Turn Signal Lights: 10W manual canceling
License Plate Light: 5W

Instruments: Electronic speedometer, tachometer, odometer; dual resettable tripmeter; high beam, neutral, oil, low fuel (plus, odometer shows miles traveled on reserve), turn signal and engine diagnostic indicator lamps; clock


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