• Ronin By Magpul
  • Ronin By Magpul
  • Ronin By Magpul
  • Ronin By Magpul
  • Ronin By Magpul
  • Ronin By Magpul
  • Ronin By Magpul
  • Ronin By Magpul
  • Ronin By Magpul
  • Ronin By Magpul
about ronin
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Ronin By Magpul

ronin detail

The Magpul Ronin is an experimental motorcycle project based on the Buell 1125R sport bike.  The project itself represents the first iteration of a design exercise inspired by interests, hobbies, and passions shared by many within Magpul.  Taken from the Japanese word for a samurai who lost his master, the name "Ronin" was chosen after the Buell Motorcycle Company ceased production and closed its doors in 2009.  The model 1125R was selected due to its high level of performance and aesthetic potential that were never fully realized by Buell as a subsidiary of Harley Davidson.


Due to the experimental nature of the project, it is not yet known if Ronin motorcycles or Magpul-designed components for the Buell 1125R will be made available for purchase.  More information about Project Ronin will be released as the design progresses, sign up above to stay in the know. If you want a Ronin, speak up! The more interest we see, the more likely we will commit to a limited production run, so let us know what you think.


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Rotax/Buell Helicon, Liquid-cooled, 4-stroke, 72° V-Twin








82 ft-lb at 8,000 RPM


146 hp at 9,800 RPM

Compression Ratio:




Final Drive type:

6 speed




Aluminum Fuel Frame

Front Suspension:

Magpul Linkage fork with Penske shock, adjustable for spring preload, and rebound damping; 99 mm travel

Rear Suspension:

Penske coil-over monoshock, adjustable for spring preload, rebound and compression damping; 127 mm travel

Front Brake:

8 piston Nissin caliper; Single 375 mm perimeter rotor

Rear Brake:

2 piston Hayes caliper; 240 mm rotor

Front Tire:

120/70 ZR-17 Pirelli Diablo Corsa III

Rear Tire:

180/55 ZR-17 Pirelli Diablo Corsa III

Front Wheel:

3.5 x17 in.

Rear Wheel:

5.5x17 in.



1374 mm / 54.1 in.




97 mm / 3.83 in. (Buell 1125r: 84mm / 3.3 in.)

Seat Height:

838 mm / 33 in.

Wet Weight:

413 lbs (Buell 1125r: 467 lbs)

Fuel Capacity:

5.3 gal. including 0.8 gal. reserve



Comparable in weight to a telescopic fork, including the radiator
Linear axle path mimics a telescopic fork for familiar handling and feedback
Front suspension action is plush yet controlled under braking
Suspension resists “standing up” while cornering on the brakes
Single monoshock damping unit is easier to tune and provides less stiction than traditional telescopic forks
Bike exhibits lighter, more fluid steering than stock Buell,
Link des allows Increased trail (97mm, 13mm more than stock Buell 1125r)
to be used with the steep steering angle of the stock Buell frame
2.3:1.0 travel ratio with rising rate linkage provides excellent damping characteristics throughout the range of travel


Single frontal radiator improves cooling efficiency and reduces overall weight
Relocating the radiator away from the frame provides cooler engine bay temperatures,
reduces the temperature of the fuel stored in frame, and reduces the heat felt by the rider


Cast handle bars are 2in. up and 3in. back increasing rider comfort.
Unitized bar assembly can be replaced with tapered 1 1/8” bars to allow for multiple choices in bar bend
Upgraded Brembo adjustable master cylinders for brake and clutch


Cast Aluminum tail section and Ram Air intake connect to form a stressed member supporting the riders weight.
Composite airbox cover
Underslung battery mount lowers center of gravity.
Decreased overall weight to 413 lbs. wet, 54lbs. less that stock Buell 1125r

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