That's usually a sign the rectifier has failed and is shorting out. Measuring resistance across the rectifier output while removed will tell you if it is shorted. Do not run it this way because it will burn up your stator. If a wire burns up there is a short in your system that needs to be corrected and not just replace the wire.
2006 Tank Urban Touring 150SE
6" intake plenum, 1.5" UNI filter, K&N precharger, 130 main jet, NGK Iridium IX CR7HIX spark plug, MRP yellow adjustable CDI, Orange high output coil, 14Ah sealed battery, 2000 RPM red torque spring, Koso 115mm variator, Dr Pulley 12g sliders