Multiple times, Billy Holt from WRH Racing sent me multiple PMs & replies to my postings advising how I could upgrade the engine performance of our '03 Pred-90.

Based on the contents within http://www.superflygirl.net/powerband.htm he was right on target!!!! If you are new to performance upgrades and want "the global level" info or explanations why specialists make specific recommendations, read the info within this site.

Note: Although site Press Here applies to Motocross engines, I'm sure the majority of the "base concepts" applies to mini-Quads a well. We'll worth reading to better understand how to bring your specific mini-quad to its higher performance output levels.

As we say in the library, "happy learning...".

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