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78 kz 1000 motorcycle and the engine number is different it Is z1e133000 this a 900 or engine?

The engine number you provided, "z1e133000," indicates that the engine is from a 1981 Kawasaki KZ1000J motorcycle, not a KZ900.

The "z1e" prefix in the engine number denotes that it is a KZ1000 engine. The "133000" part of the number is the serial number of the engine.

The KZ900 engine has a different engine number prefix, "z1b," and a different serial number range.