The YZF-R125 is the most advanced 125 production supersport machine that Yamaha has ever built. This radical, high-revving, fuel-injected 125 is the work of the same engineers who created our legendary YZF-R1 and YZF-R6 supersport bikes. And, as you’d expect, the YZF-R125 is packed with advanced MotoGP technology as well as a whole range of R-series type engine and chassis features. Its liquid-cooled, 4-stroke, 4-valve, single cylinder, SOHC engine is tuned to deliver free-revving performance right through to maximum power at 9,000rpm – and for instant response and efficient operation this remarkable 6-speed 125 is equipped with a compact fuel injection system. The race-inspired chassis features a Deltabox frame and aluminium swinging arm for outstanding handling performance, and lightweight 5-spoke wheels help to minimize unsprung weight to give impressive roadholding. A large diameter 292mm front disc with a 230mm diameter rear disc make for effective stopping power, and the aggressive R-series bodywork.
As you’ll soon see, the engine performance may not be at the level of the class-leading, top-selling Kawasaki Ninja 250R as you’d expect at half the capacity, but if looking cool is your thing, the Yamaha is top of the LAMS chain, only matched by Aprilia’s RS125 two-stroke.
Yeah, the Aprilia two-stroke may have more juice up top as what is arguably the fastest top-end of the small bores, yet the way the Yamaha’s four-stroke power is delivered is much more consistent. It’s not really worth much comparing the different engine capacities that we have in the real world, however in the world of LAMS riding once you pass your bike test, it’s these range of options that are going to be appealing to you if you’re in the market for a new small capacity ride.