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New kz owner and loving it but just lost charging system my bike is a 750 twin lmt 81 bobbed with chopped up harness can someone tell me what regulator
rectifyer i need i only have two yellow and yellow and black coming off stater.

Electrosport.com lists the ESR600 for the 1980 & 82 750 Twins with single phase charging system. There wasn't an 81 sold in the USA. Their cross-reference lists various other Kawasaki models that use the same voltage regulator. Ricks Electric is another place you can try. I'd be wary of any dirt cheap new units listed on EB.