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Based on the milage alone I am nervous about rebuilding. The cracked valve is very bad. No compression will result if that is not fixed. How much carbon is in the back of the valves?
The cam and rockets are shot. The trashed rocker is an indication than metal has been running through the oil. I bet the crank is showing this.
Honestly I would get a newer 250 or 300. The used 600 seems OK at first but when it breaks you are in the same boat with a very expensive engine to repair.
Why do the piston tops look different? Is it just the photo? Or is number two have raised lumps and number one has recessed portion for the valves to clear?
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Top speed 123.369mph. Ohio mile
Worlds fastest 250 ninja
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