This Alton 12V AC Generator (ACG05 - MagDyno) comes with a rectifying-regulator. This generator is suitable for MagDyno equipped motorcycles including:

• Ariel Red Hunter (250-350-500cc singles)
• Ariel VB600
• BSA M20, M21, B31, B32, B33, B34
• Gold Star DB34 & DBD34…
• Norton model 50
• Norton ES2 (up to 1958)
• Panther Model 100 & 120
• Royal Enfield Bullet

Does not include the drive sprocket. You must use the original dynamo drive sprocket.