Better to store bike or do idling warm up during a month of no ride

[zirconxi_imp]

Today I push my bikes around to rotate wheels. And there is some brake pad rust imprint on the rotor, some chain roller rust. CB still look ok..A bit unfortunate, my ninja (park on outer edge of shade) have chain rust lock up a few links, its part of the chain resting on the rear sprocket where the rain water will wash away the oil I have put earlier. But a bit of twisting and re-oil had freed up the link again. As for catalytic converter, my CB is without (after market exhaust), my small ninja, well, i am thinking a few high speed freeway run should clear it. I am having another idea after observing my FI car, it seems when we engage gear even when engine is cold, the computer will auto lower down the idling. What if we start our bike on center stand, and engage gear for the rear wheel to rotate. will this lower down the fuel injected into the chamber? This way I might free up my chain and scrub off my brake pad imprint on the rotor as well... And some engine sound to treat my lonely soul..