A multi cylinder bike has its own characteristics that no single cylinder can match. The elasticity of the power band of a multi cylinder engine and its capacity to provide sustained power output is not something that a single cylinder can match easily. Also a multi cylinder engine provides natural balancing which results in a smoother power band than a single cylinder even if the single cylinder engine is equipped with a counter balancer.
On the other hand the single cylinder has some very desirable characteristics, it is extremely narrow, light and quick revving. These characteristics make the engine a real hooligan and fun to ride.
So its unfair to compare these bikes. Remember, the power output on paper that most people are harping about when making a comparison is courtesy a 70 cc additional displacement for the RC 390. All said and done, the old adage 'there is no replacement for displacement' still holds true even in this day and age.






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