Reply to thread

Message

<blockquote data-quote="JakeBoucher" data-source="post: 194277" data-attributes="member: 1844">Here's how it works anyway:ATAC System: The Honda Automatic Torque Amplification Chamber system works by effectively increasing or decreasing the volume of the exhaust system with a small butterfly valve located just before the exhaust connection. At low RPM a centrifugal crankshaft driven gear opens the valve into a small chamber and increases the volume of the exhaust by allowing the exhaust gases to flow through the chamber. At high RPM the ATAC valve is closed and the exhaust simply exits into the expansion chamber. A larger expansion chamber allows for more power at lower RPMs because of the extra time needed for the impulse to &quot;bounce&quot; back for the supercharger effect. It was used on their CR motocrossers, GP bikes and MTX, MVX, NS and NSR road bikes.&nbsp; Only difference in suzukis system is instead of a crank driven gear, you manually turned the butterfly switching from low rpm riding performance to high rpm riding performance.&nbsp; I think that's how it worked anyway</blockquote>

[QUOTE="JakeBoucher, post: 194277, member: 1844"] Here's how it works anyway: ATAC System: The Honda Automatic Torque Amplification Chamber system works by effectively increasing or decreasing the volume of the exhaust system with a small butterfly valve located just before the exhaust connection. At low RPM a centrifugal crankshaft driven gear opens the valve into a small chamber and increases the volume of the exhaust by allowing the exhaust gases to flow through the chamber. At high RPM the ATAC valve is closed and the exhaust simply exits into the expansion chamber. A larger expansion chamber allows for more power at lower RPMs because of the extra time needed for the impulse to "bounce" back for the supercharger effect. It was used on their CR motocrossers, GP bikes and MTX, MVX, NS and NSR road bikes. Only difference in suzukis system is instead of a crank driven gear, you manually turned the butterfly switching from low rpm riding performance to high rpm riding performance. I think that's how it worked anyway [/QUOTE]

Verification