450 reduced to 430 and the 498 was reduced to 480 to provide the same horsepower and torque as the 2014 models yet with more “useable” power. Beta engineers call these the "perfect displacements.” The RS (dual-sport) models were available in 390, 430 and 500 only. 2015 also saw the introduction of the x-trainer 300cc 2-stroke employing oil injection. Fuel injection was introduced to the 350cc 4-stroke. 2016 saw the addition of the 350 to the RS line. Oil injection was added to the 250 and 300 2-strokes. The remaining 4-strokes 390, 430 and 480/500 received fuel injection. All 4-stroke models now come with plastic skid plates and translucent fuel tanks. In 2017 all bikes gained the convenient push button seats. The RS models are rebranded RR-S and gained USFS spark arrestors. The bikes designated RR-S are full-on versions of their electric start, fuel-injected, four-stroke dirt bikes, outfitted with the bare minimum required for a license plate. RR race edition bikes gained the new Sachs closed cartridge forks. Beta also introduced Lithium Ion batteries while the RR-S models became electric start only with the option of an add-on kick starter. 2019 saw the introduction of the carburetor equipped 200 to the RR 2-stroke line. All models of the RR line 200, 250 and 300 gained electric start. The 125 RR-S gained electric start while 125 RR remained kick start only. Through 2019 all RR-S models included an AGM battery, a 200W stator, handlebar-mounted ignition map switch, fold-away mirrors, and a factory-installed radiator fan. The RR models are the "race editions" featuring performance tweaks and stiffer suspensions but no street gear. 2020 - present For the 2020 model year Beta revamped their "Perfect Displacement" four-stroke once again. The new motors alter the crank shaft position and add twin fuel injectors allowing implementation of specialized EFI mapping to increase engine performance and mixture control. The 250cc and 300cc 2-stroke motors (including X-trainers) gained a counter-balancer. The "Race Edition" RR bikes were offered with optional Gold KYB closed cartridge forks. The 2021 200 RR Race Edition, drops the oil injection in favor of pre-mix to shed weight. There are currently eleven two-stroke and nine four-stroke models. Trail models The Alp trail motorcycle models use air-cooled Suzuki DR-model engines and due to a low seat height have a reputation of being easy to ride. Alp 4T 125 cc (2000-discontinued) Basic learner trials/trailbike. Alp 4T