The 2012 MY Beta 450RR sports a four-stroke, liquid-cooled, 449cc engine with a redesigned cylinder head, including reinforced camshaft bridge, valve retainers, and an updated cam chain tensioner. These improvements help reduce the engine noise. Also to reduce noise levels, Beta redesigned the muffler, mainly the spark arrestor, which also offers a better exhaust gas flow.
The 450RR has been improved in the aesthetics department with a new front headlight and front fender support and also a stylish new red bodywork color.