The compatibility of a ZR1000 motor with an 04 Kawasaki Ninja 636 ZX6R depends on several factors, including the engine mounting points, electronics, and transmission. While both motorcycles are Kawasaki models, it's important to note that they are from different series and model years, which could lead to differences in the engine design and mounting.
To determine if the ZR1000 motor will bolt up to your 04 ZX6R, it's recommended to consult the Kawasaki service manual or reach out to Kawasaki or a knowledgeable mechanic for accurate information. They will have the expertise and access to technical specifications to assess the compatibility of the two engines.
Additionally, consider factors beyond the physical fitment, such as the electronics and wiring harnesses. Engines from different models or years may have variations in electrical systems, sensors, and ECU compatibility. Ensuring that the electrical components of the ZR1000 motor are compatible with the ZX6R is essential for proper functionality.
It's important to thoroughly research and consult experts before attempting to swap engines between different motorcycle models or years to avoid compatibility issues, performance problems, or potential damage to your motorcycle.