Will a 1000 cbr motor fit in a 600 cbr frame?

A 1000cc CBR motor can physically fit into a 600cc CBR frame, but it may require significant modifications for proper installation and function. Factors like mounting points, weight distribution, and cooling systems must be addressed. Additionally, the frame and suspension may not be designed to handle the increased power and weight, potentially compromising safety and performance. It's advisable to consult with a professional mechanic or custom builder for such a project.