SIBLING RIVALRY: 2016 Yamaha YZF-R1M vs. YZF-R1S – COMPARISON TEST A Yamaha will win, but will it be the up-spec R1M or cost-conscious R1S? A Yamaha will win this sportbike comparison test, but will it be the up-spec YZF-R1M or cost-conscious YZF-R1S? Learn more at CycleWorld.com. SIBLING RIVALRY: 2016 Yamaha YZF-R1M vs. YZF-R1S – COMPARISON…