This Alton 12V AC Generator (ACG09 - AMC AJS Matchless) comes with a rectifying-regulator. This generator is suitable for all model years of the following vintage bikes:

• AJS Model 20
• AJS Model 30
• Matchless G9
• Matchless G9B
• Matchless G11
• Matchless G12

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