2008 Buell 1125R — Motorcyclist Magazine

25 Май 2015 | Author: | Комментарии к записи 2008 Buell 1125R — Motorcyclist Magazine отключены
Buell 1125R

Hard Parts

The 1125R engine is Erik Buell’s liquid-cooled, non-Harley-Davidson powerplant his original Barton-powered two-… roadracer in 1984. It was designed in with and built by BRP-Rotax in and, as expected, incorporates of forward-thinking technology. The 1125cc is achieved via radically oversquare (103mm bore/67.5mm …), room for big, 41.3mm and 35mm exhaust valves.

are splayed 72 degrees apart, a chosen because it provides a 18-degree valve angle and the possible flow path for the intake system, which is with dual 61mm bodies managed by H-D’s own 3 EFI technology. Dual overhead are operated by a combination chain/gear with a self-adjusting chain the intake cam, which in drives the exhaust cam via gear-making for a compact cylinder head, engine weight and allowing the to be mounted farther forward in the

Valves are actuated via finger (technology borrowed from 1 racing) to reduce friction, quicker valve opening and eliminate high-rpm valve To control vibration, the engine is with no fewer than balance shafts: two to cancel rotating imbalance and a third cancels the rocking couple.

oiling reduces internal losses, and oil is held in an integrated oil in the lower left side of the in the swingarm, as on the air-cooled XBs. A large-volume muffler wraps the bottom of the engine; careful provides linear power without use of an exhaust valve, and the incorporates a Helmholtz chamber to noise. All major engine are unique to Buell, and the engine not be shared with other or used to power any other products.


Like any proper the 1125R gets a stacked, six-speed gearbox complete straight-cut gears operating on a mechanism for smooth, light action. Attached to the output is a compensated sprocket that acts as a cush drive at the instead of at the rear wheel, clever engineering solution further centralizes mass and unsprung weight.


Buell says the Intuitive Response frame is its yet. The main spars of the structure are even more than those of the XB, and that space is put to good use to hold an 1.8 gallons of fuel, raising capacity from 3.8 to 5.6 gallons. The new has been optimized for torsional to better resist side in corners, aided by a solid-mounted that serves as a stressed member.

Buell 1125R

The swingarm mounts to the engine cases to minimize width and create an even rigid connection between the wheel and frame. The arm is also than 2 inches longer the XB’s, increasing the wheelbase 52 to 54.6 inches to better wheelies in light of an added horsepower. Front-end geometry identical to that of the XB with a 21 degrees of rake and 3.3 inches of


The HVA (Hydraulic Vacuum clutch utilizes vacuum generated within the intake to assist clutch action for effort at the lever and to provide a effect. At open throttle pressure in the intake manifold is which results in full loads on the clutch plates to slippage and maximize forward at closed throttle the manifold increases, leading to lower on the clutch diaphragm and effectively clutch clamping load, lets the clutch slip to reduce engine braking and chatter during aggressive


The plus-sized, 47mm fork-one of the fattest ever to an OEM sportbike-was a necessary upgrade, as the 43mm XB fork would be by the new, stiffer frame. The (handlebars are integrated into the clamp) have likewise stiffened, and the fork is fully The piggyback-reservoir shock is also from Showa, and is likewise adjustable.

The shock mounts horizontally to room for the muffler below, and is on directly by the swingarm without of a linkage, relying instead on a wound spring.

Buell 1125R


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