I can't see the problem! There are HRC "ball park base settings", as you call them, in the 250 Tuning section, and the head volume info above is straight out of the HRC manual.

Are you telling me HRC didn't know what they were talking about?

Assemble a "stock" F-III motor "by the book", and it WILL make 71hp/72PS!

Assemble a pretty much stock motor, as per the service manual (i.e. STOCK) and it will make 60hp.*

*With airbox mod and wiresplice

We've said time and time again not to mess with the compression ratio. You will find numerous threads where we have "highlighted" bad information regarding high compression. NSR250's [a] don't need it, and [b] don't like it! To "highlight the incorrect info" in this thread would require highlighting pretty much all of it!!!!
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Andy.
NSR-WORLD.COM

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