atec

[ke125er]

any 1 here of a atac cylnder for the 250r? it says 248cc on it .... any 1 know what it is and if thar anygood?

[Red Rider]

ATAC was the Honda CR250's first generation "powervalve" system. It stands for Automatic Torque Amplification Chamber and works similarly to Suzuki's AETC system. It's basically a chamber that the exhaust gasses get bypassed thru during certain portions of the powerband. I have no experience with them, and other than the above, I don't know much about them.