#4-stroke

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The 2018 RR range, presented to the public in June, has now been beefed up with a Racing version. These models are developed through the Beta Race division and are very similar to the bike that Enduro World Champion Steve Holcombe, as well as USA race team riders Max Gerston and Jordan Ashburn compete on. 2018 Racing models will be available in the 250 and 300 cc (2-stroke) and 350, 390, 430 and 480 cc (4-stroke) engine sizes.   With the influence of the official Beta Factory Teams, numerous upgrades have been made to reduce weight and improve handling during the array of situations that the riders encounter in their championships.   Racing versions benefit from the numerous technical improvements introduced on the standard bikes including: 2-stroke Models:  -All New clutch: A total overhaul has developed a more compact and lighter weight clutch that improves its feel, precision, and stability as operating temperatures change. This new system provides more progression in clutch feel that allows for better control overall, making the tough lines even more graceful. A smaller, more compact clutch cover has been installed. -Elimination of the kick-start: the incredible work put into making the electric starter more reliable has allowed the kick-start lever to be removed, significantly reducing weight. Given the engine design, a kick-start can still be ordered as an option. -New gear change system: updated star wheel and detent mechanism improves the precision of the transmission eliminating any possible uncertainties when shifting gears. -New air filter box: intense testing was done on the 2-stroke engine timing advance curves to optimize output enabling the introduction of a new air filter box. -New cylinder: improves performance in terms of torque and power output throughout the rev range while keeping the response perfectly linear. -Rounded piston and new cylinder head profile: (300cc only): together with the new cylinder, provides smoother engine performance while providing better traction.  -Crankshaft: redesigned configuration that is matched to the new cylinder which increases stiffness and provides less engine vibration. -New connecting rod: revised lower bearing area to improve durability. -New power valve timing: different design of the power valve ramps to better adapt to the new primary drive ratio, ensuring better power delivery. -New combustion chamber (250cc only):provides a higher compression ratio which has increased the power output. -New Chassis The front-end of the frame has been completely redesigned enabling an increase in the flexural and torsional rigidity characteristics compared to previous versions and with a notable reduction in weight thanks to an improved structural layout. This generates a consistent improvement in handling and riding precision. -Air filter box and rear sub-frame: lighter and slimmer design giving the bike a more aggressive look.  -Lithium battery: lighter in weight, more powerful and reliable. -New skid plate: improved fastener accessibility for quicker removal. -New muffler heat shield: protects the rider from burns.  -Takasago Excel rims: with a new black finish specifically designed for Beta. 

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