Considering the comparison between Karizma and Yamaha YZF R15, the sensible option to go for is Yamaha YZF R15. Yamaha YZF R15 is the first model for the Indian market designed in the true supersport image and featuring a high-level balance of enjoyable running performance on winding roads. Packed full of state-of-the-art technologies, the new YZF-R15 boasts performance worthy of a supersport model and a body design that evokes the image of the YZF-R series and gives visual expression to the quality of its ride. The YZF R15 is powered by 149.8cc Fuel Injected liquid cooled engine that will be producing an almost impossible 17bhp with maximum torque of 15 Nm at 7500rpm; which makes it like the most powerful bike under 200cc range and has a 6-speed Transmission.