Join Date: May 2004
Location: Toronto, Canada
If you are using exhaust gas analysis, or even just a wide-band to measure air/fuel ratio, then the secondary air injection system needs to be blocked so that the exhaust gas measurement does not give a false lean reading. But, you don't need block-off plates to do that ... just plug the hose leading to the air suction valve.
Helibars, MRA screen, Ohlins damper, reversed shift pattern, sorted suspension, braided lines, Michelin Pilot Power, all else stock 'coz it's fast enough!