The new generation R15 V3 gets a bunch of updates to engine. It is a 155 cc single cylinder liquid cooled engine which makes 19 bhp at 10000 rpm and 15.1 nm of peak torque at 8500 rpm. Then there is the rether slicj 6 speed transmission as well. But the biggest update that the engine gets is the variable valve actuation or vva. Ita variable valve timing in plain speak and its job primarily is to get the engine to pump out more torque and power at both ends of the rev range.