Beta engineers were clearly hard at work in preparation for the 2015 model year, with changes announced for its bikes across the board. Substantial updates to the RR 4-Stroke engine (available in 350cc, 390cc, 430cc and 480cc) highlight the coming year’s upgrades, in addition to the inclusion of a Beta/Synerject-developed electronic fuel injection system for the 350RR. The inclusion of EFI on the 350RR marks the first production Beta to be made available with FI, and the system comes with a 42mm throttle body and stepper motor to ensure engine performance remains consistent in a wide variety of conditions.
Beta’s RS Dual Sport line-up (in 390cc, 430cc and 500cc) receives the same engine modifications as its RR models. On the 2-Stroke side, the company’s 250cc and 300cc iterations get powerplant updates and chassis refinements for improved overall performance. Pricing for all 2015 Betas is included at the bottom of the article.
2015 Beta RR & RS
During the past few years Beta has focused primarily on chassis improvements but for 2015 the Italians are focusing on the powertrain, resulting in lighter engines for all motorcycles in the RR and RS range. One major change to note is that engine capacities have actually decreased in all but the 350RR, with the 2014 400RR down to 390cc in 2015, the 450 down to 430cc, the 498 down to 480cc and so on. According to Beta, changes to the exhaust system and camshaft profiles keep the previous year’s horsepower and torque figures in tact despite the reduction in displacement.
The main cases were redesigned inside and out, achieving a weight savings thanks to a new die-casting process. They house a new oil pump drive system that’s been simplified via removal of a drive gear found on the previous year’s models. The crankcase chamber is reshaped, now including ribs to ensure optimal stiffness while affording a more compact design. Overall weight reduction was enhanced by changes to the clutch and flywheel covers, too.
Beta developed new crankshaft shoulders which make them lighter and help to reduce inertia. The balancer shaft is updated as well to work in union with the new crankshaft. Connecting rods have been shortened and redesigned also. Many of the changes Beta made are geared to better centralize the mass of its off-roaders, and the company asserts that “the entire combustion unit (is) positioned lower down compared to the previous models. This means that masses are more compact and closer to the center of gravity.”
The piston has been lightened and strengthened and the piston pin now features a Diamond-Like-Carbon treatment. Camshaft profiles are updated to improve low-speed performance and overall power delivery. The cylinder is redesigned to optimize cooling and the cylinder head is completely new, with updated ports and combustion chamber shape. Completing the reconfiguration, the intake tract is changed to accord with the new engine sizes.
Beta also reworked the exhaust systems on the RR and RS models. The silencer features new passages and a larger manifold connection hose diameter. US models will come with a spark arrestor.
And Beta didn’t stop there. In terms of chassis adjustments, the Sachs USD 48mm fork comes with a new compression piston design to improve oil flow and better absorb heavy hits. The sleeves and bushings are updated and the spring profile is redesigned. Out back the rear shock comes with a new piston and redesigned oil passages to optimize damping consistency during long motos. Comfort is also enhanced by softer seat foam padding.
Unique to the RS is the return of the Voyager GPS instrument panel which comes with navigation, mph, tachometer, compass, outside temperature, trip meter, maps and more standard. The RS models also feature cooling fan kits to improve engine temperature regulation - a big plus for slow-speed woods riding. The Michelin Enduro tires are rated for 90% off-road and 10% on-road use.
2015 Beta RR 2-Stroke
The 250RR and 300RR 2-Strokes get some engine love as well. For the 300, Beta transferred its 2014 RR Race Edition mill with a new cylinder, combustion chamber and CDI. On the 250, the company updated the engine’s exhaust valve adjustment system and fitted a new silencer to the pipe.
Both 2-Strokes benefit from the same suspension upgrades as the RS and RR models, with matching tweaks to the Sachs fork and rear shock.
Beta continues to offer its Build Your Own Beta (BYOB) program to customers as well, allowing buyers to order their machines online and have them delivered to the Beta dealer of choice. Started in 2008, BYOB gives customers the chance to choose from over 300 Beta accessories and each BYOB bike comes with a special name plate engraved with the buyer’s name.
2015 Beta MSRP Information
2 Stroke Off Road:
250 RR - $8199
300 RR - $8199
4 Stroke Off Road:
350 RR EFI - $9399
390 RR - $9299
430 RR - $9349
480 RR - $9499
Street Legal Dual Sport:
390 RS - $9599
430 RS - $9699
500 RS - $9799