This is a brand new, heavy duty replacement regulator rectifier for your Triumph Bonneville 120. This redesigned unit uses the latest technology and highest quality materials available, producing a higher output capacity and making it sturdy and reliable. This is a super heavy duty rectifier with an impressive 50 amp capacity! This part should work great if you run other electronics on your vehicle. This 50 amp regulator rectifier is able to handle much more current than the OE part. If you have had to replace your regulator rectifier more than once, try this ultra heavy duty unit. This regulator rectifier has been manufactured to precisely control voltage and current, maximizing power without risking damage to the generator. Accurate voltage control is necessary to maintain a proper charging rate on the battery. This unit is cost-efficient and easy to install. This product meets or exceeds all factory specifications.