For the first time, the Spanish manufacturer Beta will be offering two-strokes in its off-road lineup in 2013. The RR 250 and 300cc Betas feature electric-start two-stroke motors that are manufactured and assembled by Beta and are fitted in specifically designed frames, only the swingarm, wheels, brakes and bodywork is shared with Beta's four-stroke range.
Here's what Beta has to say about its new two-strokes:
ENGINE
Available in 250cc and 300cc displacements, their bore and stroke are 66.4 x 72mm and 72 x 72mm that represent the best compromise to get the perfect power delivery and a solid feel of the torque needed.
Crankcases are made by die-casting, to obtain lightness and stiffness simultaneously. They are entirely machined in-house to ensure quality and accuracy.
Magnesium covers minimize the total weight of the engine.
Crankshaft in two pieces, with polyamide inserts for proper balance and to eliminate the harmful empty volume in the crankcase and allows the best balance between inertia and mass.
Forged two-ring piston provides reduced rotating mass while also improving durability.
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Beta Announces Two-Stroke Off-Roaders