British engineer Alen Millard spent a long time working in nuclear energy and missile engineering, and now he is engaged in creating motorcycles. His bikes are truly incredible because he equips them with V6, V8, and even V12 engines. 
It is the V12 that is installed on Alen Millard’s latest creation – the Kawasaki Z2300. This 2.3-liter engine is not taken from a supercar – the Briton created it himself. 
More precisely, he cobbled it together from two Kawasaki sixes.
The result is 250 hp, which means more power than sports bikes. However, this wonder motorcycle weighs a whole 350 kg, so it practically devours both fuel and rear tires. But what a sound it makes! You really have to hear it.