BETAs for 2015

2015 350 RR EFI

The evolution of the Beta brand has been on the rise. Not only have they become a player in the off-road racing arena, their line has grown and evolved to the point that they are serious contenders.

2015 RR 4 STROKE

Beta’s main objectives during development were to make the bike lighter, easier to control, and improve overall handling. The engine’s center cases and internal components have been lightened and redesigned to reduce the rotating mass. Too, the engine sizes have been reduced to make handling easier and minimize weight. Compared with the larger capacity of the previous model, the absolute power and torque figures remain unchanged thanks to a new camshaft profile and a new exhaust system.



The main innovation of the 2015 RR Enduro 4-stroke range is the introduction of electronic fuel injection system to the 350 RR. The system was developed together with Synerject uses a 42 mm-diameter throttle body. Electronic fuel injection ensures precise throttle control and offers automatic changes to the air-fuel mixture for different altitude and temperature changes. The engine offers immediate and smooth response and thanks to the adoption of a stepper motor mounted on the throttle body engine braking has been reduced.

2015 430 RR



The Beta engineering team has picked four new engine sizes, all with different power characteristics. The 350’s size remains the same while the 400 has been reduced to a 390cc. The 450 and 498 engines have also been reduced to 430cc and 480cc to provide the same horsepower and torque as the 2014 models yet with more “useable” power for the rider.  They’ve shed weight on the 430 and 480 engines (2.2 lbs.) and 3.3 lbs. on the 350 and 390 engines.

With all-new main cases that are lighter thanks to new die-castings, and modified internally to house a new oil pump drive system. The crankcase chamber has been redesigned in order to minimize pumping losses, and the entire shape has been reworked thanks to the introduction of ribs that stiffen the engine cases while offering a more compact design.

Both the clutch and flywheel covers have also been modified with a goal to reduce weight and at the same time, increasing the rigidity. At the crankshaft new shoulders are lighter to reduce inertia, making the bike quicker to deliver power and more agile thanks to a reduction of the gyroscopic effect.  Beta now uses shorter connecting rods that are lighter and aimed at reducing the rotating masses and the overall size of the engines. A new box in box piston is lighter reducing vibrations and an increase in performance.


Other engine news is:


*The piston pin is coated with a Diamond-Like-Carbon (DLC) treatment to minimize friction and wear.

*The camshafts were developed with a new profile to boost performance, especially at low speeds, and to provide an improved power delivery.

*The cylinder features a new design for the water jackets to improve the removal of heat and increase the efficiency of the whole cooling system.

*The head has been completely redesigned both in terms of the ports and combustion chamber shape, in relation to the needs of the new engine sizes and is also more compact externally.

*The starter motor has been significantly improved and is more powerful and lighter compared to the previous models.

*The silencer has been redesigned with new internal passages and a larger diameter at the manifold connection. The new design is matched with the new engine displacements to provide optimum power while retaining its quietness. USA models will contain a spark arrestor as well.


The Sachs USD 48mm fork has been further developed in close collaboration between Beta and Sach’s engineers and features many changes. A new of the compression piston with “three slot” geometry improves oil flow and lets it absorb violent hits more progressively. To improve the general smoothness of the fork a spring-support release system has been included to eliminate rotational friction, and the spring profile has been redesigned to guarantee better insertion inside the sleeve.

At the shock a new piston has been redesigned to improve its flow and reduce overheating during operation. This means that the shock absorber offers more stable performance, precise and reliable even under very intense use.

2015 500 RS
All RS models come standard with the Trail Tech Voyager GPS





The popular RS Dual Sport models are also all new including three different displacements being offered for 2015. RS models share all of the engine updates as the new RR models and are available as a 390, 430, or 500.

New for the coming year is the Voyager GPS units which are standard on all RS models and features GPS system, MPH, tachometer, engine coolant temperature, compass, outside temperature, trip meter, maps, as well as a external SD card for uploading and downloading your adventures. RS models are fitted with cooling fan kits for the extreme Dual Sport conditions. The fan keeps engine temps down and aggressive Michelin Enduro tires that are designed for 90% off road and 10% on road.


2015 RR 2 STROKE

The 2015 RR Enduro 2-stroke range has also evolved with the 250 machine featuring certain technical innovations and the 300 version getting special parts from the 2014 Racing model.


Electric starter motor is under the engine-out of harms way



300 RR 2-Stroke: The engine comes directly from the 2014 RR Race Edition and includes a new cylinder, combustion chamber and CDI. The reduced width of the exhaust port has better sealing of the power valve and provides improved throttle response with a long and very linear spread of power. The combustion-chamber profile, together with the digital electronic control unit continue to optimize engine output in every stage of operation with primary objective to increase performance and ride-ability of the bike.


250 RR 2 Stroke: The engine’s exhaust valve adjustment system has been modified, increasing the number of adjustment springs from 1 to 2. This change significantly improves engine output, optimizing the opening of the exhaust valve at every stage of operation.



A new silencer for the 250 RR offers a smaller diameter internal core compared to the 300 RR which improves the response to throttle and increases peak revs.




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