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According to the spec sheet, will be powered by a fuel-injected 286cc single-cylinder engine, with a bore of 76mm and 63mm stroke. Based on this, we surmise the engine is indeed based on the CBR250R’s engine which has a similar 76mm bore, but with a 55mm stroke.
The larger engine claims a peak output of 30.4 hp at 8500 rpm and 19.9 ft-lb. at 7250 rpm. The CBR250R by comparison claims 23.7 hp at 9900 rpm and 12.7 ft-lb. at 7400 rpm. The CBR300R claims a curb weight of 362 pounds, including ABS, which is lighter than the ABS-equipped CBR250R’s claimed curb weight of 366 pounds.
Compared to the Kawasaki Ninja 300 and its 296cc parallel twin engine, the CBR300R still trails the Ninja’s claims of 39hp and 20 ft-lb. The CBR300R however is about 21 pounds lighter than the Ninja 300.
The wheels and tire sizes appear to be the same as the CBR250R’s, with a 110/70-17 up front and a 140/70-17 at the rear.
We’ll still waiting to hear whether the CBR300R will be offered in the U.S. It’s worth noting that American Honda hasn’t yet announced the 2014 CBR250R yet, which should be a good sign we’ll be getting the 300 instead.