Mine's made just under 68hp with standard heads and port timing* on pump 97 unleaded. I've seen NSR's with increased compression fall flat on their asses a number of times... and fail to even make 60hp!

Fiddling with compression isn't something to undertake lightly, and like I said in my first post, there are better ways to reliable power.

*My ports and deck heights are "optimised", and while it ran extremely strong for 3 years, even then it still eventually eroded away the tops of the barrels due to sporadic detonation. (I do tend to run the jetting rather close to the edge much of the time though.) I am confident that had the compression been increased beyond standard, there is no way it would've suffered the abuse it did for 3 years! I've seen bikes with fresh motors and increased compression fail to even finish a track day!
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Andy.
NSR-WORLD.COM

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