2018 Beta 125 RR
Double piston rings (ø 54 mm): component designed to ensure high rigidity and reliability; the choice of double rings provides a better seal at the low and medium rpm ranges typical of Enduro.
Beta progressive valve: the system derived from the RR 2T 250 and 300 cc, characterized by a particular relationship between the opening of the main flap and that of the side boosters. The delay in opening the boosters enables excellent progressiveness in performance throughout the rpm range of the engine.
Crankshaft with polyamide inserts: favoring lightness and ensuring optimum filling of the crankcase to the benefit of performance and reliability.
Cylinder: presents an exhaust flange system like that on the larger MY 2018 displacements, enabling better control of the piston-flap-cylinder front tolerance. By keeping this value to a minimum it is possible to achieve a significant performance boost at low rpm, reducing the leakage of gases.
Aluminum dismantable cylinder head: rigid and lightweight solution made possible by moving the engine coupling on the cylinder. The geometry of the combustion chamber is designed to ensure high efficiency of the thermodynamic cycle and to obtain the best compromise between responsiveness at low-to-medium revs and in bursts. It also facilitates the fine tuning and replacement of the combustion chamber.
Die-cast crankcase in aluminum alloy: the casing geometries were designed according to an innovative layout in terms of the relative position of components and with a view to maximum weight reduction without compromising structural strength. The main bearing area received particular attention to ensure the correct rigidity of the walls in order to withstand the stresses transmitted by the crankshaft.
Die-cast crankcase covers in magnesium alloy: ensuring very low weight and optimal surface finish. It was possible to also adopt this solution for the inner clutch cover thanks to the isolation of the water pump from this element. Vforce4 reed valve packet: the presence of the stoppers ensures high reliability without compromising performance.
6-speed dog-box transmission: specially developed for this engine with gears made by mechanical machining of forged parts so as to provide mechanical strength and reliability while still maintaining very low size and weight.
Clutch: multi-disc in oil bath with reverse opening, actuator integrated in the outer cover. This is a system designed for maximum lightness and compactness of the engine which, thanks to its low positioning, ensures the reduced size of the power unit and a significant centralization of weight, very important for good chassis dynamics.
Engine Type: Beta-Built single cylinder, 2-stroke, with BPV power valve system
Starter/Battery: Kick start
Fuel System: Keihin PWK 36mm
Cooling: Liquid Cooling
Clutch: Wet multi-disc
Frame: Molybdenum steel/double cradle w/quick air filter access.
Front Suspension: 48 mm Sachs USD fork, adjustable compression and rebound, TFX technology.
Rear Suspension: Aluminum Body Sachs shock w/adjustable rebound and hi/ low-speed compression
Front/Rear Brakes: Disc Brake 260mm/240mm
Front/Rear Tires: 21/18
Ground Clearance: 12.8”
Seat Height: 36.6”
Tank Capacity: 8.5 Litres
Weight w/o Fuel: 207 lbs.